Restop Ring #90270500 3;. ▶ Application: Fits For General Pump 20mm Pressure Washer Pump T1011 T2031 T9211 TS1011 TS1021 TS1041 TS1511 TS1531 TS1711 TS1811 TS2011 TS2011. Adopt advanced seal structure to reduce loss in pressure and water leaking between the head or manifold of the pump and the back end, rebuild and strengthen your pump.