ZOTEE 20 sq.ft. Top Load Spa Replacement Filter Cartridge 2 PackSpecs Product Type: Spa Replacement Filter Cartridge OEM : 20 sq. ft. Top Load Compatibility: Unicel C 4ch 20 Filbur FC 0125 Pleatco PVT25W PAD, PSG25W PAD Top Cap: Handle Bottom Cap: 1 1 2" Male Thread MPT Outer Diameter: 4 5 8" Length: 6 3 4" Surface Area: 20 sq ft Quantity: 2 Filter Cartridges Details ZT 158 Spa Filter Cartridge: 20 sq. ft., 4 5 8" Diameter, 6 3 4" Long ZOTEE Spa Filter Cartridges are designed with Unique trilobal fiber structure

Basket Dimensions: Compatible with most Thru-Wall skimmers

to keep the sponge flexible

Product Type: Spa Replacement Filter Cartridge OEM : 200 sq

General Foam Plastics Compatibility: Unicel-C-4306/Filbur-FC-3742 Top Cap: 1-3/4" Bottom Cap: 1-3/4" Outer Diameter: 4-1/4" Length: 8" Surface Area: 5 sq ft Quantity: Single Filter Cartridge

17-3/8" Long

ZT-139 Spa Filter Cartridge: 30 sq

Oval 6-1/4"x5-1/4" Long

please ensure the filter basket size matches your swimming pool skimmer

6-7/8" Diameter

ZT-172 Spa Replacement Filter Cartridge: 5-11/16“ Diameter

it is recommended that you clean filter cartridges every 2 weeks to maximize your spa's performance

Filtration Area: 28 sq