Please measure the length of the thick tube to determine the model
Sinking 40# Thick tube length 14.5cm. Sink length: 4cm
Sinking 60# Thick cylinder length 16cm .Sink length: 4cm
Sinking 80# Thick tube length 17.5cm .Sink length: 4cm
Sinking 100# Thick tube length 19.5cm .Sink length: 4cm/6cm
How to install the gas lift cylinder on your own?
Tip the chair onto its side.
Use the rubber mallet to tap and remove the base of the chair away from the seat.
Use the pipe wrench to clamp tightly onto the top of the cylinder. Twist and then pull up in order to remove the cylinder.
Remove the orange cap of the new cylinder. Insert the bottom of the cylinder into the center of the chair base.
Carefully lift both the chair base and the chair cylinder into the chair mechanism. The parts will then fasten on their own.
Chair Gas Lift Cylinder Replacement Pneumatic Shock Stroke Office Parts Height Lowering Sinking Color : Black Size : NO.80 - YMVJ8B96