Replacement spa filter cartridge  Pleatco: PRB17.5SF  Unicel: C-4401  Filbur: FC-2386   Darlly: 40352   Sold as a pair

Measures 117mm long, Outer dia: 127mm, Hole dia: 53mm

2 x 17.5 sq ft filtration - 35sq ft total

Replacement cartridge for Apollo Spas, Aqua Tech Spas, Arizona Pacific Spas, Beachcomber, Canspa Manufacturing, Catalina Spas, Clearwater Spas, Diamond Back Spas, Discovery Spas, Dynasty Spas, Esther Williams Pools, Freedom Spas, Hydro Spa, Legend Spas, Lifestyle Spas, PDC Spas, Pentair Pool Products -Rainbow Plastics, Royal Spas, Sundance Spas, Sunrise Spas, Thermo Spas, Viking Spas, Waterway Plastics