Assembly Kit, Check Ball Material Stainless Steel, Compatible with Grainger Part Number 2CAP4, 2CAP6, Compatible with Manufacturer Model Number 650778-2A4, 650782-2A4, 666053-2A4, 666053-344, 666053-388, 666053-3A4, 666056-2A4, 666056-6A4, 666057-2A4, 66605H-2A4, 66605H-6A4, 66605J-2A4, 66605J-344, Diaphragm Material PTFE, Number of Check Balls 4, Number of Diaphragms 4, Number of O-Rings 9, Number of Seals 9, Valve Type Ball, Product Type Fluid End Repair Kit