Replacing OEM numbers:350013Z,U9-229,which is a direct replacement for the old or broken one. Compatible with Dura, Compatible with Max-E-Glas Pump Lid,Compatible with Sta-Rite Pool and Spa Pump. Compatible with Intelliflo VF, Compatible with Intelliflo Variable Speed,Compatible with VS+SVRS, Compatible with Whisperflo, Compatible with Challenger, Compatible with Pinnacle, Compatible with Intellipro VS+SVRS, Compatible with Intelliflo I1, Compatible with EQ Series Commercial,Compatible with Waterfall pool/spa pumps. The O-ring has an outer diameter of 15.9cm, an inner diameter of 14.5cm, and a wire diameter of 7mm. Product include a total of 2pcs pool pump lid o-ring, which can completely meet your daily use needs and replacement., Manufacturer: Briny River