Cartridge diameter -7"
Cartridge length - - 19-5/8"
Top configuration -Open, Bottom configuration -Open
Top dimension -3", Bottom dimension -3"
Square footage - 50
Spa OEM's that use this filter cartridge- Cal Spas, Hollibaugh Spas, PDC Spas, Vita Spas, Premier Hot Tubs, Springwater Spas, Commander, Hercules II
Manufacturers & Products that use this filter cartridge- Hayward - Star-Clear C500. Pentair- Purex CF-50, open/w molded gasket.