Product Descriptions: 1. Fitment: General Pump Kit 69 Packing Kit Fits General Pump T1011 T2031 T9211 TS1011 TS1021 TS1041 TS1511 TS1531 TS1711 TS1811 TS2010 TS2011 etc; Fits Interpump Pump W101 W131 W151 W20 W203 W355 W912 W913 etc. More information about compatible models please refer to Product Description 2. Material: Made of superior rubber with smooth surface, fine workmanship for good sealing performance, resisting oxidation, UV rays, solvents, acids and ozone; A must have replacement to rebuild your pump .