Kit includes 1 of each of the following:

SP610HD  is a heavier duty chair seat plate rated for up to 350 lb rating.The design of this office chair seat plate is universal and will fit any and all brands of chairs using a similar mounting pattern.  Accepts standard 17-4 tapered pneumatic gas cylinder.  Single lever to activate the gas cylinder and when pushed in to lock the tilt in forward position.  Hand wheel for tilt tension adjustment

CC9 Heavy duty Gas Spring Pneumatic cylinder cartridge Spindle Strut Piston replacement for standard office chair. This cartridge Gas Spring has 4” Stroke Travel and is CLASS 4 with 400n.  Main body is 1.1" (28mm) diameter and is 9.2” long. The tapered end that goes into the seat plate / mechanism has a standard 17-4 taper.  All hardware including bearing and retaining clip are included.  CLASS 4 cylinders are typically installed on chairs up to 350 lb rating.

This set will replace any and all brands regardless of where you purchased the chair.