Repair Kit Check Ball Material Santoprene Compatible with Manufacturer Model Number PD20E-FES-PAA PD20P-FKS-KAA PD20P-FPS-PAA PE20P-FPS-PAA-AA0 PE20P-FPS-PAA-AD0 PE20P-FPS-PAA-ADE PE20P-FPS-PAA-ADF PE20P-FPS-PAA-AS0 Diaphragm Material Santoprene Number of Check Balls 4 Number of Diaphragms 2 Number of O-Rings 16 Number of Seals 24 Valve Type Ball Product Type Fluid End Repair Kit Media Intake Pressure (Maximum) 120 psi