This chair piston extends from 210mm to 275mm ( 8.26 - 10.82" ), minimum
length: 8.26 inches. maximum length when fully extended: 10.82 inches, travel from the highest to the lowest point, replace your office chair gas cylinder and stop worrying about disturbing anyone, 360 degree rotation to all directions, freely lift and rotate your office chair smoothly and quietly.. Our office chair piston passed the top-level test of BIFMA certification by lifting up and down 120, 000 times without fail, they built with high-quality solid steel that can support maximum weight up to 1000 lbs. The safety decompression structure design will be more secure than other gas lift cylinder you ever use.