Wet End Repair Kit, Check Ball Material Buna-N, Compatible with Grainger Part Number 6WY77, Compatible with Manufacturer Model Number DB6I, HDF2, Diaphragm Material Buna-N, Number of Check Balls 0, Number of Diaphragms 2, Number of O-Rings 0, Number of Seals 4, 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