KAB K4 Premium Leather 24 Hour Office Chair - 31 Stone Capacity
Description
KAB K4 Premium Leather 24 Hour Office Chair
The KAB K4 Premium is engineered for continuous 24-hour use in demanding environments including control rooms, operation centres, and general office settings. Rated for users up to 31 stone (200kg), this chair combines robust construction with comprehensive ergonomic adjustability.
Key Features
Built on a robust steel frame with a 30 stone rated gas lift, the K4 Premium delivers exceptional durability. The adjustable seat base cushion accommodates operators of all heights, with 50mm seat cushion length adjustment and a unique 0 to 7.5 degree upward tilt function. Height adjustment spans 100mm via gas-assisted mechanism, ensuring optimal desk positioning.
Ergonomic support includes air lumbar adjustment for personalised lower back comfort, plus a height and tilt adjustable headrest. The adjustable backrest recline and seat tilt with tension adjuster allow users to find their ideal seating position. Tip-up comfort armrests provide flexibility when entering or exiting the chair.
KAB Tilt System Technology
The proprietary KAB Tilt System features side-mounted rotary controls for intuitive adjustment. Weight adjustment accommodates users from 50-200kg with easy tension range modification. An anti-kick safety system prevents unexpected seat movement, while simple height and tilt controls ensure quick positioning changes during long shifts.
Construction and Specifications
The chair sits on a 700mm wide 5-star base fitted with castors suitable for hard floors. Overall width including armrests measures 685mm, with seat cushion length adjustable from 430-480mm. Standard medium gas lift provides seat heights from 460-560mm, with low (440-510mm) and high (530-650mm) gas lift options available upon request.
Additional Options
Customisation options include rubber soft tyre castors for enhanced floor protection, polished aluminium 5-star base upgrade, alternative gas lift heights for specific desk configurations, and an optional footring for elevated seating positions.
KAB K4 Premium Features
- 30 stone rated gas lift
- 24-hour use approved
- Seat cushion tilt adjuster (0 to 7.5 degrees upwards)
- Seat cushion length adjustment (50mm)
- Adjustable backrest recline
- Air lumbar support
- Tip-up comfort armrests
- Headrest (height & tilt adjustable)
- Contoured cushions
- Seat tilt with tension adjuster
- Height adjustment 100mm (gas assisted)
- 5-star base
- Castors suitable for hard floors
- Robust steel frame
KAB Tilt System
- Side mounted rotary controls
- Easy weight adjustment 50-200kg
- Easy tension range adjustment
- Easy height and tilt adjustment
- Anti-kick safety system
Further options on request
- Rubber soft tyre castors (suitable for hard floors)
- Polished Aluminium 5 star base
- Footring
Dimensions (mm)
- Width Including Armrests: 685
- Seat Cushion Length: 430 - 480
- 5 Star Base Width: 700
- Seat Height (Medium Gas Lift): 460 - 560
- Seat Height (High Gas Lift): 530 - 650
Frequently asked questions
What distinguishes the KAB K4 Premium from other 24-hour chairs?
The KAB K4 Premium is specifically designed for multi-user environments where different operators need to adjust the seat depth. It features a unique adjustable seat base cushion that can be extended by 50mm and tilted upwards by up to 7.5 degrees. This ensures that users of varying heights can maintain correct circulation and thigh support during 24-hour shifts.
How does the air lumbar support system work?
Unlike standard mechanical lumbar supports, the K4 Premium utilises an air lumbar system. This allows the user to precisely inflate or deflate the lumbar cushion using a hand pump, providing a bespoke level of pressure that contours exactly to the lower back. This is highly effective for reducing fatigue during long-duration sitting.
What is the maximum weight capacity of the K4 Premium?
The K4 Premium is built on a heavy-duty steel frame and is rated for users up to 200kg, or approximately 31 stone. This makes it one of the most robust ergonomic chairs available, supported by a 30-stone rated gas lift and a wide 700mm 5-star base for maximum stability.
What are the benefits of choosing leather for the K4 Premium?
Leather is the ideal choice for multi-shift environments where hygiene is a priority. Because the surface is non-porous, it can be easily wiped down with a sanitising cloth between operator changes. It also offers a premium, executive look and is exceptionally resistant to wear and tear.
Does the leather upholstery affect the ergonomic features?
No, the leather version includes the exact same ergonomic suite as the fabric model, including the 50mm seat cushion length adjustment, the 7.5-degree upward tilt, and the height and tilt adjustable headrest. The leather is carefully fitted to ensure the air lumbar support remains fully responsive.
Which KAB K4 Premium model is right for me?
The choice between fabric and leather depends primarily on your working environment. The KAB K4 Premium All Fabric is the best option for users who prioritise breathability and a softer, more cushioned feel. The KAB K4 Premium Leather is recommended for shared 24/7 environments like emergency services or control rooms, where easy cleaning and a prestigious executive appearance are the main requirements.
Although we sell on the internet we like to think that people buy from people so why not call us to discuss your needs. We love to talk and advice is free: 01473 807500.
KAB Colour Options
Xtreme Fabric by Camira
Navigator
- YS009 & YS079
- YS047, YS030, YS084, YS004, YS005 & YS026 - POA
Director
- YS009
- YS079, YS047, YS030, YS084, YS004, YS005 & YS026 - POA
K4
- YS009
- YS079, YS047, YS030, YS084, YS004, YS005 & YS026 - POA
Controller
- YS009
- YS079, YS047, YS030, YS084, YS004, YS005 & YS026 - POA
Executive
- YS009
- YS079, YS047, YS030, YS084, YS004, YS005 & YS026 - POA
ACS Executive
- YS009
- YS079, YS047, YS030, YS084, YS004, YS005 & YS026 - POA
Fabric details
Xtreme is a modern crepe weave fabric made from 100% post-consumer recycled polyester, diverting waste from landfill and saving virgin raw materials. Its stretch properties, coupled with high flame retardancy, durability and non-pilling properties make Xtreme an ever popular fabric for task seating.
Heavy duty / 10 year guarantee. Independently certified to ≥100,000 Martindale cycles.








KAB Warranty
KAB Seating confirms the following in respect of its guarantee on all current products.
- All product is supplied fit for purpose, as stated on the specifications
- All product meets the stated technical specification current at the end of manufacture
- All products will normally provide up to five year usage on General Office use and up to two years for 24-Hour usage providing:
- Regular cleaning has been carried out by the end user (as specified in the Trim Selector cleaning guide )
- Furniture has not been subjected to continuous usage i.e. shift usage (applies to general office use only)
- Furniture has only been subjected to normal ‘wear and tear’
- Furniture has not been subjected to misuse or abuse and is regularly maintained
We reserve the right for our technical staff to investigate on site any claim arising from this product guarantee.
KAB Seating Warranty Statement:
“The Company’s liability in respect of any defect in or failure of goods supplied is limited to replacing or (at it’s option) repairing or paying for the repair for replacement of goods that are found to be defective by reason of faulty or incorrect design, workmanship, parts or materials.”
KAB Delivery Information
Made to order: This product is manufactured and configured specifically for your order.
Estimated lead time: 4-6 weeks. We'll confirm a more accurate timeframe once the factory has provided its production schedule.
Please note that some manufacturers have seasonal factory closures, which can affect production and delivery times.
Delivery and assembly: The chair will be delivered boxed and will require assembly.
Why Choose LockwoodHume?
- Over 40 years experience in the furniture industry
- Free UK mainland delivery on all items
- We offer a friendly and professional service
- Large project? Request a quote
- Genuine pricing and promotions
- Seen it cheaper? info@lockwoodhume.co.uk
- Product guarantees
- Family run business
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Refund Policy
Returns, Refunds & Cancellations Policy
We understand that sometimes an order may not be quite right, or that circumstances can change. If you need help with a return, cancellation or an issue with your order, please contact us at info@lockwoodhume.co.uk and we'll be happy to help.
Returning Standard Products
If you have purchased a standard product and decide that it is not suitable, you may request a return within 14 days of receiving your order, in accordance with your consumer rights.
Before sending anything back, please contact LockwoodHume so that we can approve the return and provide the correct return instructions.
To process your return request, we will need:
- Your order number
- Your name and contact details
- The product(s) you wish to return
- The date your order was received
- Photographs showing the goods securely repacked for return
Products should be returned in their original packaging wherever possible and must be protected appropriately during transit. This helps prevent damage during the return journey and allows us to process your return efficiently.
Please note that returned items should be handled only as much as necessary to inspect their condition, characteristics and functionality. If goods are returned with damage or signs of use beyond this, we may make a reasonable deduction from any refund to reflect any reduction in value.
Return Collection and Costs
Delivery to mainland UK is included with our products; however, if you decide to return an item because you have changed your mind, the cost of returning the goods remains your responsibility.
If you would prefer, LockwoodHume can arrange collection on your behalf. The cost of collection will be deducted from your refund.
Due to the nature of furniture products, some items may require specialist collection arrangements. Where applicable, we will advise you of any return or collection costs before the return is arranged.
Some products are supplied directly by our manufacturing partners. Where a manufacturer accepts a return, they may apply their own restocking or handling charges. If such charges apply, these may be passed on to you.
If you would like to understand the likely return arrangements for a specific product before ordering, please contact us and we will be happy to advise.
Refunds
Once returned goods have been received and inspected, any refund due will be processed within 14 days.
Refunds will normally be made using the same payment method used for the original purchase.
Where applicable, we may make reasonable deductions for:
- Damage caused to the goods after delivery;
- Parts or repairs required due to damage or misuse;
- Return collection arranged by LockwoodHume;
- Reasonable return or handling costs incurred in arranging the return.
Any deductions will be explained clearly before the refund is processed.
Faulty or Damaged Goods
We understand that receiving a damaged or faulty product is disappointing, and we will always aim to resolve these situations as quickly as possible.
If your goods arrive damaged, or if you experience an issue with your product, please contact us as soon as possible at info@lockwoodhume.co.uk.
To help us investigate and resolve the issue, we may ask for photographs of the product and packaging.
Please inspect your delivery when it arrives and notify us of any visible damage within 48 hours of delivery wherever possible. This allows us to investigate promptly with our delivery partners and manufacturers.
Our first approach will usually be to resolve issues through replacement parts or repair where this is practical.
As we do not hold replacement components for every product in stock, we may need to source parts or technical information directly from our manufacturers. LockwoodHume will manage this process on your behalf.
If a repair is not possible or does not provide a suitable solution, we will discuss an appropriate alternative, which may include replacement of the product or another remedy in line with your statutory rights.
Made-to-Order, Custom & Bespoke Products
Some products on our website are designated Made to Order. This means they are not held as finished stock ready for dispatch and are instead manufactured or configured specifically following receipt of your order.
This includes products that are manufactured to order, as well as products available with a choice of specifications, such as fabric, colour, finish, size and other options.
Some products can be made or customised specifically to your individual requirements. This may include bespoke dimensions, non-standard materials or finishes, personalised products, or other specifications outside the manufacturer's usual range.
As these products are manufactured specifically following your order, Made-to-Order products cannot normally be cancelled once the order has been placed with the manufacturer and are non-returnable after dispatch.
Cancelling a Made-to-Order, Manufactured to Order, Custom or Bespoke Order
If you need to cancel one of these orders, please contact us within 24 hours of placing your order. We'll always do our best to stop the order before it is released to the manufacturer.
After this time, the order may have been released for production and materials may have been allocated specifically for your order. Depending on the manufacturer and how far the order has progressed, cancellation charges may apply. Where a manufacturer applies a cancellation charge, this may be passed on to you. These charges vary by manufacturer and product and can be up to 40% of the order value.
Made-to-Order, Custom and Bespoke products can only be returned where they are faulty, damaged, not as described or where you have another statutory right to a remedy.
If you are unsure whether a product is classed as standard, made-to-order, custom or bespoke, please contact LockwoodHume before placing your order and we will be happy to clarify.
