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Silver metal gas lift cylinder, 5.5 inch stroke, Class 4 heavy duty

BFKK

BFKK 5.5" Gas Lift Cylinder Class 4 450lbs

SKU CH-YGCH-51W31

A 5.5 inch stroke gas lift cylinder rated to 450 lbs, fully expanding to 17 inches and compressing to 11.5 inches, with 360 degree rotation for universal chair repair

  • TypeChair & Furniture Accessories
  • Supports users up to 450lbs with Class 4 strength
  • 5 inch stroke adjusts seat height from 11.5 to 17 inches
  • Universal fit replaces cylinders on most office and gaming chairs
  • 360 degree rotation moves smoothly in every direction
  • Installs without extra screws to fix a sinking chair

Replacement Gas Lift for Heavy-Duty Chairs

This Class 4 gas lift cylinder replaces worn pistons in office, executive and gaming chairs. It supports users up to 450lbs and fits the standard universal mounting size. The 5.5 inch stroke raises the seat from 11.5 to 17 inches. Installation requires no extra screws.

Sustained Load Behaviour

The cylinder is built to BIFMA Plus quality standards for continuous heavy use. It maintains consistent lift force throughout the 5.5 inch travel range. Full 360 degree rotation stays smooth and quiet under the maximum 450lb rating. The hydraulic pneumatic design resists sinking during long sitting sessions.

450lb Weight Capacity Decides Fit

Choose this part only if the chair occupant and any regular load stay at or below 450lbs. The Class 4 rating matches the piston strength to that limit. Heavier requirements need a different cylinder class. The 5.5 inch stroke and universal fit are secondary to the weight rating.

Highlights

  • Supports users up to 450lbs with Class 4 strength
  • 5 inch stroke adjusts seat height from 11.5 to 17 inches
  • Universal fit replaces cylinders on most office and gaming chairs
  • 360 degree rotation moves smoothly in every direction
  • Installs without extra screws to fix a sinking chair

Specifications

TypeChair & Furniture Accessories

Questions about this item

Does the 5.5" stroke cylinder stay quiet and smooth after hours of daily height changes?

The piston is designed for full 360 degree rotation and smooth, noiseless movement in all directions during extended use.

What chair base and seat hardware must I already have for this universal cylinder to fit?

It replaces most standard office, executive and gaming chair cylinders without extra screws, using the common tapered stem and top plate.

Will the Class 4 450lbs rating work reliably with an older steel frame chair I want to keep?

The heavy-duty construction meets BIFMA Plus quality standards and supports up to 450lbs on compatible older frames.

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