Pentair 24850-0010 Clamp Bolt Replacement Sta-Rite System 3 Pool and Spa Filter Clamp bolt replacement Fits Pentair Sta-Rite System 3 SM, SMD-Series modular media and D.E. filters Also fits Pentair Sta-Rite System 3 SD, SS-Series D.E. and sand filters Measures 2-1/4-inch length by 1-inch height by 1-7/8-inch width