AODD-20 Air Operated Diaphragm Pump Inlet/Outlet:20mm(3/4" inch); Air inlet size: 1/4" Max flow: 57L/min; Max head: 70M (7bar); Pump material: Ductile iron(SG iron),Cast steel, aluminum, stainless steel(SS304 SS316 SS316L), polypropylene(PP), PVDF; View More aodd-20 diaphragm pumpaodd-20 pump