... 3)10-year-experience in valve industrial Stop valve1. size:1/2"-2"2.Material: Body Brass,Hpb57-3,Hpb59-3, ... C3770,DZR. Stem Brass Stem, Brass as above. Sealing PTFE/TEFLON,VITON,O-RINGS. Handle Brass handle,Iron handle,Stainless steel handle. Nut Brass nut,Steel nut, ... .3.Technics: Forged.4.Guaranty: 5 years guatanty5,Surface: brass color, yellow color6,certrification: CE ISO9000:2000 Brass stop valve