Ecodora 0E33514 Diaphragm Pump S. APPB-12 With Multiple inlet/outlet in Polypropylene and Aluminum. R. 1:1 - 60 l/min, With Membranes in Teflon®+hytrel®, Balls in Teflon®, Seats in Aisi 316 Stainless Steel and Polypropylene and Cylindrical Ball Valve With Spring.