Fluid End Repair Kit, Check Ball Material FKM, Compatible with Grainger Part Number 6WY79, Compatible with Manufacturer Model Number DV6S, HDF2, Diaphragm Material FKM, 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, Standards Not Applicable