Allows the chair it's installed on to handle weights of up to 150kg, while allowing the user to adjust the chair height within the 'tall' range of measurements = 480-570mm. This Gas Stem is compatible with all of our ergonomic chairs.

Steps to Replace a Height Adjustment Gas Strut:

1. Lay down some material (tarpaulin or newspaper) to protect the surface you’re working on.

2. Turn the chair on its side and tap the centre of the base with a rubber mallet away from the seat. The 5-star base should come loose.

3. Use a pipe wrench near the top of the gas strut and twist until it releases from the chair seat. Apply WD-40 if you’re having trouble.

4. Place the bottom of your new gas stem into your chair’s 5-star base.

5. Lift both into the chair’s seat and flip it over. Everything should be fitted correctly.

6. Test the new gas strut by sitting on the chair and adjusting the height.

Alternatively, refer to our manual here or request a gas strut removal tool from our Service Team.

If you have any difficulties, feel free to call our friendly service team at 0333 123 200 or email service@hoodseating.com for guidance.

Allows the chair it's installed on to handle weights up to 200kg  (typically 150kg) while allowing the user to adjust the chair height to the standard range. The heavy-duty gas stem is compatible only with the i29, F94, K22 & V46 range of ergonomic chairs.

Steps to Replace a Height Adjustment Gas Strut:

1. Lay down some material (tarpaulin or newspaper) to protect the surface you’re working on.

2. Turn the chair on its side and tap the centre of the base with a rubber mallet away from the seat. The 5-star base should come loose.

3. Use a pipe wrench near the top of the gas strut and twist until it releases from the chair seat. Apply WD-40 if you’re having trouble.

4. Place the bottom of your new gas stem into your chair’s 5-star base.

5. Lift both into the chair’s seat and flip it over. Everything should be fitted correctly.

6. Test the new gas strut by sitting on the chair and adjusting the height.

Alternatively, refer to our manual here or request a gas strut removal tool from our Service Team.

If you have any difficulties, feel free to call our friendly service team at 0333 123 200 or email service@hoodseating.com for guidance.

Allows the chair it's installed on to handle weights of up to 150kg, while allowing the user to adjust the chair height within the 'short' range of measurements on the chair's product pages. This Gas Stem is compatible with all of our ergonomic chairs.

Steps to Replace a Height Adjustment Gas Strut:

1. Lay down some material (tarpaulin or newspaper) to protect the surface you’re working on.

2. Turn the chair on its side and tap the centre of the base with a rubber mallet away from the seat. The 5-star base should come loose.

3. Use a pipe wrench near the top of the gas strut and twist until it releases from the chair seat. Apply WD-40 if you’re having trouble.

4. Place the bottom of your new gas stem into your chair’s 5-star base.

5. Lift both into the chair’s seat and flip it over. Everything should be fitted correctly.

6. Test the new gas strut by sitting on the chair and adjusting the height.

Alternatively, refer to our manual here or request a gas strut removal tool from our Service Team.

If you have any difficulties, feel free to call our friendly service team at 0333 123 200 or email service@hoodseating.com for guidance.

Enhance your F94 or i29 chair with Hood Seating's Ergonomic Headrest, purpose-built to add extra neck and upper-back support without compromising on comfort or adjustability.

Key features:

• Height adjustable – Slides up and down to align perfectly with your head and neck, regardless of your height or seating position.
• Angle adjustable – Tilts to your preferred position, providing consistent support whether you're sitting upright or reclined.
• Retrofit compatible – Fits easily onto existing F94 and i29 chairs, so you can upgrade your current seating in minutes.
• Removable – Simple to take off when not needed, giving you full flexibility over your setup.

A straightforward, practical upgrade for anyone using the F94 or i29 who wants added support during long working hours — a popular addition for office renovation and fit-out projects.

Replace your castors with our set of 5 chair glides for a stable, fixed-position base — ideal where rolling wheels are a hazard rather than a help. Compatible with all our ergonomic office chairs.

Glides are a simple, effective adaptation for users with limited mobility or balance difficulties, preventing the chair from rolling away during sitting or standing transfers.

Glides are also a practical choice for offshore and marine environments, where vessel motion can send castors rolling unpredictably — glides keep seating steady regardless of deck movement.

Why choose glides over castors:

• Prevents chair roll-away during sitting/standing transfers — a key consideration for users with limited mobility or balance issues
• Stays put on moving or sloped surfaces, making them ideal for ships and other vessels where deck motion affects castors
• Reduces fall and injury risk, supporting workplace accessibility accommodations
• Works on uneven or non-standard flooring, including deck grating and thresholds where castors can catch
• Fits all our ergonomic office and gaming chairs — simple like-for-like replacement
• Set of 5 — enough for a full castor swap on one chair

Replace your castors with our set of 5 chair glides for a stable, fixed-position base — ideal where rolling wheels are a hazard rather than a help. Compatible with all our ergonomic office chairs.

Glides are a simple, effective adaptation for users with limited mobility or balance difficulties, preventing the chair from rolling away during sitting or standing transfers.

Glides are also a practical choice for offshore and marine environments, where vessel motion can send castors rolling unpredictably — glides keep seating steady regardless of deck movement.

Why choose glides over castors:

• Prevents chair roll-away during sitting/standing transfers — a key consideration for users with limited mobility or balance issues
• Stays put on moving or sloped surfaces, making them ideal for ships and other vessels where deck motion affects castors
• Reduces fall and injury risk, supporting workplace accessibility accommodations
• Works on uneven or non-standard flooring, including deck grating and thresholds where castors can catch
• Fits all our ergonomic office and gaming chairs — simple like-for-like replacement
• Set of 5 — enough for a full castor swap on one chair

For those who want maximum head and neck coverage, the Executive Headrest brings a larger, more substantial profile to your F94 or i29 chair — delivering generous support for extended periods at the desk.

Key features:

• Larger footprint – A bigger, more enveloping design offers wider coverage across the head and neck for enhanced comfort and support.
• Height adjustable – Slides up and down to align with your natural head and neck position, regardless of your height.
• Retrofit compatible – Fits easily onto existing F94 and i29 chairs, making it simple to upgrade your current seating.
• Removable – Detaches when not required, giving you flexibility over your setup.

A premium, no-fuss upgrade for anyone using the F94 or i29 who wants extra head and neck coverage without the need for angle adjustment — ideal for executive offices, boardrooms, and fit-out projects where a more substantial look and feel is preferred.

These castors benefit from brake-loaded technology, which reduces the risk of a chair rolling once someone has sat in it. The rubberised soles also help the chairs they are installed on from rolling.