Fluid End Repair Kit, Check Ball Material Santoprene, Compatible with Grainger Part Number 20LR29, Compatible with Manufacturer Model Number E1SA6X669C-ATEX, Diaphragm Material Santoprene, Number of Check Balls 4, Number of Diaphragms 2, Number of O-Rings 4, 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 Versamatic, Standards Not Applicable