Pentair 37400-0028S Viton Shaft Seal Replacement Sta-Rite Pool and Spa Inground Pump Viton shaft seal replacement Fits Pentair Sta-Rite IntelliPro VS 3050 and Max-E-Pro series pool and spa pumps Also fits Pentair Sta-Rite Max-E-Glas II and Dura-Glas II series pool and spa pumps Measures 2-3/4-inch length by 1-3/4-inch height by 1-3/4-inch width