The 1st option fits the 325 and 375H polyshell chair
The 2nd option fits the 400 and 450H polyshell chair
Minimum order of 50 replacement seats applicable
How do I know it will fit my existing frames?
Measurements for screw holes on the Polyshell chairs as follows -
Small Shell underneath (to fit 325 and 375H polyshell chair)
Front - holes are 230mm apart
Back - holes are 182mm apart
Front to Back - holes are 175mm apart
