AUTO-VOX Gas Lift Cylinder Stopper 25mm Coupling
A 25 mm solid carbon-steel clamp locks a sinking office or gaming chair at the desired height using dual screws and the included Allen wrench, with no cylinder removal required
- Tube size25 mm-1P
- Size or dimensions1.7 in × 1.7 in × 0.59 in
- Locks chair at chosen height with dual-screw clamp
- Fits standard 25mm cylinders on most office and gaming chairs
- Installs in minutes using supplied wrench without removing cylinder
- Solid carbon steel construction resists wear and handles heavy loads
- Black corrosion-resistant coating protects finish during storage and use
Universal 25mm Cylinder Stopper
The AUTO-VOX stopper clamps onto a standard 25mm gas-lift cylinder and locks an office, gaming or executive chair at a chosen height. Solid carbon steel construction replaces failed pneumatic seals without removing the cylinder or disassembling the seat. A 7.7 cm Allen wrench is included for the dual-screw clamp, so the repair takes minutes at home or in a commercial workspace.
Capacity and Headroom
Inner diameter 25mm, outer diameter 45mm and 15mm thickness give a rigid collar that resists the axial force of a seated adult. The heavy-duty steel body handles daily height adjustments and continuous load without the creep common to plastic split-ring fixes. It will not restore lost pneumatic lift; if the cylinder no longer holds any pressure the chair stays at the locked height only.
Upgrade From Temporary Fixes
Replaces tape wraps, hose clamps, plastic collars or makeshift shims that slip under load. The jump is worth it when the chair sinks repeatedly and a permanent, tool-free mechanical lock is preferred over cylinder replacement. Not for chairs with non-standard cylinder diameters, integrated seat mechanisms that block clamp access, or users who need the original pneumatic height adjustment restored.
How it compares
Measured against everything we stock in Hose Fittings, Adapters & Clamps, at today’s prices. Recalculated every night.
- Price $14.99
- Cheaper than about 58% of the 2,955 comparable items (median $17.99).
Specifications
| Product | |
|---|---|
| Brand name | AUTO-VOX |
| Model name | Hand Rivet Nut Setter Kit |
| Size & build | |
| Tube size | 25 mm-1P |
| Size or dimensions | 1.7 in × 1.7 in × 0.59 in |
Questions about this item
Will this 25 mm clamp fit around the cylinder on my existing office chair without removing the base?
Yes, the stopper is designed for 25 mm inner-diameter cylinders and installs with the included Allen wrench while the cylinder stays in place.
How can I verify the height lock is holding after I tighten the dual screws?
Sit in the chair and apply your full weight; the seat should stay at the set height with no gradual drop, confirming the carbon-steel clamp is gripping securely.
Does the package contain everything needed for installation, or do I need extra tools?
The box includes one black carbon-steel stopper (inner diameter 25 mm, outer diameter 45 mm, thickness 15 mm) and a 7.7 cm Allen wrench — no other tools are required.
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