Diaphragm Pump Repair Kit, Check Ball Material Santoprene, Compatible with Manufacturer Model Number 6661T3-3EB-C, 6661U3-2EB-C, 6661U3-3EB-C, 6661U4-4EB-C, 6662A3-3EB-C, 6662A3-8EB-C, 6662A4-4EB-C, 6662B3-2EB-C, 6662B3-3EB-C, 6662B4-4EB-C, Diaphragm...