2) Unicel C-7660 Spa Replacement Cartridge Filters 60 GPM Pac-Fab Wet Institute

Sharp pleat folds maximize spacing between pleats Tough urethane end caps assure durability for the life of the cartridge Outside Diameter: 7 7/8 Length: 14 Top End Cap: Open 3 1/16 id Bottom End Cap: Open 3 1/16 id Pleat Count: 146 Each Media: 4 oz Each Description: 60 GPM Pac Fab, 60 GPM Wet Institute Part #: **2 x C7660** Manufacturer warranty: 1-year warranty