ZOTEE 50 sq.ft. Predator, Clean and Clear Spa Replacement Filter CartridgeSpecs Product Type: Spa Replacement Filter Cartridge OEM : 50 sq. ft. Predator, Clean and Clear Compatibility: Unicel C 9405 Filbur FC 0684 Pleatco PAP50 4 Top Cap: 6" open Bottom Cap: 6" open Outer Diameter: 10 1 16" Length: 8 9 16" Surface Area: 50 sq ft Quantity: Single Filter Cartridge Details ZT 156 Spa Filter Cartridge : 50 sq. ft., 10 1 16" Diameter, 8 9 16" Long ZOTEE Spa Filter Cartridges are designed with Unique trilobal fiber structure and