Diaphragm Pump Repair Kit, Check Ball Material PTFE, Compatible with Grainger Part Number 5U674, Compatible with Manufacturer Model Number 6661T3-344-C, 6661T4-444-C, 6661U3-344-C, 6661U4-444-C, 6662A3-244-C, 6662A3-344-C, 6662A4-444-C, 6662B3-344-C, 6662B4-444-C, Diaphragm Material PTFE, Number of Check Balls 4, Number of Diaphragms 4, Number of O-Rings 21, Number of Seals 21, Valve Type Ball, Product Type Fluid End Repair Kit, Media Intake Pressure (Maximum) 120 psi