Wet End Repair Kit Check Ball Material Buna-N Compatible with Grainger Part Number 4GGF2 Compatible with Manufacturer Model Number E2AA2R220C-ATEX Diaphragm Material Buna-N Number of Check Balls 4 Number of Diaphragms 2 Number of O-Rings 0 Number of Seals 0 Valve Type Ball Product Type Fluid End Repair Kit Media Intake Pressure (Maximum) 125 psi Compatible with Pump Type Air Operated Double Diaphragm Pump Compatible with Brand Versa-Matic