Body: Brass CC754S, Cover: Brass CW617N, Seat and body isolation valve: Brass CW614N, Plug: Polyamide, Piston, seperating, lever and hooking system: Acetal, Gasket: PTFE, O-ring: EPDM perox, Seat gasket and O-ring: NBR, Spring: Stainless steel grade 302–1.4310, Float: Polypropylene.