Aquaform Spas AQUAFORM SPAS 50

The Aquaform Spas 50 is a compatible replacement for the following pool and spa filters: Unicel C-4950 Harmsco H-4950 PRB 50IN The Aquaform Spas 50 Sq. Ft. Pool and Spa Filter has a diameter of 4 15/16 inches and is 13 5/16