Pentair 192115 O-Ring Drain Plug Replacement Select Pool/Spa Filter and Pump O-Ring drain plug replacement Fits Pentair Sand Dollar, Tagelus, Triton II pool and spa filters Also fits Pentair Challenger High Flow and High Pressure, IntelliFlo VF, IntelliFlo VS 3050, VS/SVRS, WhisperFlo pool and spa pumps Also compatible with Pentair SuperFlo, Pinnacle, Sta-Rite SuperMax, EQ-Series Commercial, WaterFall, Sta-Rite OptiFlo pool and spa pumps Measures 1-1/2-inch by 1/16-inch; made of buna-N 70