1 Inch Diaphragm Pump AODD-25/25A/B-25 1 inch diaphragm pump is air operated have three models: AODD-25 , AODD-25A , AODD-B-25. Pump material: Aluminum,Stainless steel 304 316L,PP,PVDF. Inlet/Outlet:1" 25mm. View More Aluminum Diaphragm PumpPP Diaphragm PumpPVDF Diaphragm PumpStainless Steel Diaphragm Pump