Multistage Pressure Regulator For Acetylene Gas Cylinders, Class''2'' With Inlet Pressure Of 20 Bars & Maximum Flow Of 25 0 Ltrs./Min.Conforming To Is:6901- 2009 (Second Revision) Iso 2503-1998; With Stainless Steel Diaphragm At 1St Stage & Neoprene Rubber Diaphragm At 2Nd Stage & Inlet With Ceramic Filters- Isi Marked. [ Warranty Period: 30 Months After The Date Of Delivery ] ]