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Silver metal cylinder with black base and orange tip

BFKK

BFKK Office Chair Hydraulic Cylinder 7.5 in 440 lbs

SKU CH-HGK8-062WS

Replacement gas-lift cylinder with 7.5 in stroke supports up to 440 lbs for office and executive chairs

  • TypeChair & Furniture Accessories
  • SGS-tested and BIFMA-certified for safety
  • Supports up to 440 lbs for heavy-duty use
  • 5 in stroke fits most office chairs
  • Thickened outer steel resists wear and bending
  • Integrated springing cushions impact when sitting down

Replacement Gas Lift Cylinder

This BFKK gas lift cylinder replaces the worn piston on standard office, executive and computer chairs. It restores smooth height adjustment so the seat rises and lowers without sticking or sinking.

Verify Stem Diameter And Travel Before Buying

Measure the outer diameter of the old cylinder stem and the length of its stroke to confirm they match the 7.5 inch specification. Also check that the chair base and mechanism accept a universal tapered fit, because some brands use proprietary columns.

Suits Users Up To 440 Lbs Seeking A Direct Swap

The cylinder is rated for 440 lbs and meets BIFMA and SGS test standards for heavy-duty use. Buyers needing a different stroke length, a non-standard stem size or a locking mechanism should look at other models.

Highlights

  • SGS-tested and BIFMA-certified for safety
  • Supports up to 440 lbs for heavy-duty use
  • 5 in stroke fits most office chairs
  • Thickened outer steel resists wear and bending
  • Integrated springing cushions impact when sitting down

Specifications

TypeChair & Furniture Accessories

Questions about this item

Does the 7.5 in hydraulic cylinder come with the rubber mallet and pipe wrench shown in the installation steps?

The cylinder is supplied alone; the rubber mallet and pipe wrench needed to remove the old unit and fit the new one must be sourced separately.

The listing mentions SGS testing and BIFMA certification — does that cover the full 440 lbs rating?

Yes, the gas lift has passed SGS testing and holds BIFMA certification for a load capacity of up to 440 lbs.

How much height adjustment does the 7.5 in stroke actually give once the cylinder is fitted to a typical office chair?

The 7.5 in stroke provides up to 7.5 inches of vertical travel, letting the seat move through that full range once installed.

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