Guardian Spa Filter Replaces Pleatco PJ50-4, Unicel C-9650, Filbur FC-1460 Jacuzzi, Atlantic Pool Products, Cantar, Cft-50,Cfr-50 Replaces Pleatco: PJ50-4, Unicel: C-9650, Filbur: FC-1460 Dimensions: Diameter 10", Length 10", Top Open Hole 5 15/16", Bottom Open Hole 6" Filter Area: 50 sq. ft. Filter Material: Reemay (4 oz/yard) Used in Atlantic Pool Products, Cantar, Competition Pool Products, Jacuzzi Brothers, Kd Pools, Kitt Pools