Heavy duty Gas Spring Pneumatic cylinder cartridge Spindle Strut Piston replacement for standard office chair.

• 4” Travel
• Main body is 1.1" (28mm) diameter
• 9.2” long

Please measure the existing piston body to confirm it is between 8.7 - 9.7" long and ensure the travel is no longer than 4.5".

The tapered end that goes into the seat plate / mechanism has a standard 17-4 taper.  The steel used is heat treated making it stronger.  All hardware including bearing and retaining clip are included.  

Works on Darafeev Poker Chairs, Herman Miller Reaction chairs, and any chair with an existing cylinder that meets the above specifications