Diaphragm Pump Repair Kit Check Ball Material PTFE Compatible with Grainger Part Number 2CAP5 2CAP6 Compatible with Manufacturer Model Number 666053-244 666053-344 666056-244 666056-644 666057-444 66605H-244 66605H-644 66605J-244 66605J-344 66605K-244 66605K-444 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 Media Intake Pressure (Maximum) 120 psi