Adjustable 11-17 Inch Office Chair Gas Lift Cylinder Replacement Plus 5.5 Inch Stroke Heavy Duty 1000 Lbs Hydraulic Pneumatic Piston Fits Most Office Chairs BIFMA Class 4 Black

Heavy-Duty 5.5in Stroke Gas Lift Cylinder for Chairs
✔️ Fits most chairs: 2" outer diameter, 1-1/8" shaft

Replace worn chair gas lift with this heavy-duty cylinder. It restores smooth height adjustment and prevents sinking on most office chairs that use standard 2 in outer diameter bases and 1-1/8 in piston shafts. The matte black cylinder comes as a single replacement for easy upgrading.

✅ Stroke length: 5.5 in (140 mm) for full height range
✅ Compressed length: 11.69 in (297 mm)
✅ Fully extended length: 17.2 in (437 mm)
✅ Outer diameter: 2 in (50 mm)
✅ Piston shaft diameter: 1-1/8 in (28 mm)
✅ Max load capacity: 1000 lbs (454 kg)
✅ Class 4, meets BIFMA/ANSI standards
✅ Matte black finish, heavy-duty steel body

💡 What is a gas lift cylinder used for in an office chair?

It's handy for keeping height adjustable and preventing sinking during daily use.

- restore height adjustment for ergonomic comfort - fits standard 2 in outer diameter bases - supports up to 1000 lbs for heavy seating