Pentair 24851-9001 25-Inch Upper Half Tank Shell Replacement Kit Sta-Rite System 3 Pool and Spa Filter Upper half tank shell replacement kit Fits Pentair Sta-Rite System 3 SM-Series modular media pool and spa filters Also fits Pentair Sta-Rite System 3 SD, SS-Series D.E. and sand pool/spa filter models S8D110, S7S70 Includes all decals and labels Measures 25-inch