Diaphragm Pump Repair Kit, Check Ball Material Buna-N, Compatible with Manufacturer Part Number 666053-222, 666053-322, 666056-622, 66605H-622, 66605J-322, Diaphragm Material Buna-N, Number of Check Balls 4, Number of Diaphragms 2, Number of O-Rings 11, Number of Seals 11, Valve Type Ball, Product Type Fluid End Repair Kit, Media Intake Pressure (Maximum) 120 psi, Compatible with Pump Type Air Operated Double Diaphragm Pump, Includes Balls, Diaphragms, Seals