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Silver metal gas lift cylinder, 2.5 inch diameter, extends 210 to 275mm, supports 1000 lbs

BFKK

BFKK 2.5 inch Class 4 Gas Lift Cylinder 210-275mm 1000 lbs

SKU CH-6DDD-521K2

Replaces office chair cylinders with a 50mm standard hole, extending 210mm to 275mm and supporting 1000 lbs with 360-degree rotation

  • Product typeChair & Furniture Accessories
  • Extends 210-275mm for flexible seat height
  • Class 4 cylinder tested to 120,000 cycles
  • Supports up to 1000 lbs load capacity
  • Fits 99% of chairs with 50mm base hole
  • 360° rotation with smooth, quiet operation

Universal 50 mm Fit

This Class 4 gas lift cylinder replaces the piston on 99 % of standard office, task, executive, salon chairs and rolling stools that use a 50 mm centre hole. The 2.5 inch diameter body slides into the existing base without extra screws, and the kit includes gloves for the swap.

210–275 mm Travel Range

The piston extends from 210 mm to 275 mm, giving 8.26 in minimum and 10.82 in maximum height with full 360 degree rotation. Smooth, quiet operation is rated for 120000 BIFMA cycles, so the lift stays consistent through years of daily adjustment.

1000 lb Load Rating

Solid-steel construction and a safety decompression structure support up to 1000 lbs, making this cylinder suitable for heavy-duty users. Buyers needing a shorter or longer stroke, or a non-standard base diameter, will not be served by this model.

How it compares

Measured against everything we stock in Office Desks, Chairs & Monitor Arms, at today’s prices. Recalculated every night.

Price $41.99
Cheaper than about 88% of the 5,255 comparable items (median $235.99).

Specifications

Product
Product typeChair & Furniture Accessories

Questions about this item

Which length range should I pick for my chair?

This single model telescopes from 210 mm to 275 mm (8.26 to 10.82 in), so choose it if your old cylinder falls anywhere inside that span.

What does the 1000 lbs rating mean when the cylinder is in a real chair?

The Class 4 piston is tested to support up to 1000 lbs, so it will hold heavy users and dynamic loads without sagging during daily height changes.

What does the 50 mm centre-hole standard cap in practice?

The 50 mm (2 in) hole fits 99 % of standard office, task, executive, salon and rolling-stool bases, letting you swap the cylinder in about five minutes with the included gloves.

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