Wet End Repair Kit Check Ball Material Buna-N Compatible with Grainger Part Number 4YPL8 Compatible with Manufacturer Model Number DB2A HDF1 Diaphragm Material Buna-N Number of Check Balls 0 Number of Diaphragms 2 Number of O-Rings 12 Number of Seals 8 Valve Type Flap Product Type Fluid End Repair Kit Media Intake Pressure (Maximum) 125 psi Compatible with Pump Type Air Operated Double Diaphragm Pump Compatible with Brand Sandpiper