ZOTEE 90 sq.ft. Sundance 19"w/ 1-1/2" MPT Spa Replacement Filter CartridgeSpecs Product Type: Spa Replacement Filter Cartridge OEM : 90 sq. ft. Sundance 19"w 1 1 2" MPT Compatibility: Unicel 7CH 90 Top Cap: 2 1 2" open w beveled edge Bottom Cap: 1 1 2" male thread MPT Outer Diameter: 7" Length: 19" Surface Area: 90 sq ft Quantity: Single Filter Cartridge Details ZT 126 Spa Filter Cartridge: 90 sq. ft., 7" Diameter, 19" Long ZOTEE Spa Filter Cartridges are designed with Unique trilobal fiber structure and Highly uniform