Pentair U43-21SS Extend Tooth Washer Replacement Sta-Rite Pool and Spa Pump Extend tooth washer replacement Fits Pentair Sta-Rite Max-E-Pro series and IntelliPro inground pool/spa pump model VS 3050 Also fits Pentair Sta-Rite Max-E-Glas/Dura-Glas and Max-E-Glas II/Dura-Glas II series full/up rate inground pool and spa pumps Also compatible with Pentair Sta-Rite Dyna-Pro/Dyna-Pro E, Dyna-Glas/Dyna-Max series, Dyna-Wave series and Dyna-Jet TPE series pool/spa pumps Measures 1/4-inch length by 1/4-inch height by 1/4-inch width