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

• 3” Stroke Travel
• Main body is 1.1" (28mm) diameter
• 7.28” long

Please measure to ensure the existing piston body is between 6.78 - 7.78" long.

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.