Unicel C-8417 175 Square Feet Swimming Pool Replacement Cartridge Filter

Unicel C-8417 fits the following filter models:
     Hayward Star-Clear Plus C1750
     Waterway Pro Clean 175
     Sta-Rite Posi-Clear PXC150
NOTE: Filter top and bottom ends are both open w/molded gasket and 4 inch inside diameter.