1.Material:High Pure 59% Brass 2.Finish/Plating:bronze / chrome/ Brush Nickle 3.Plating Thickness:about 12UM Four towel bar1.Material:High Pure 59% Brass 2.Finish/Plating:bronze / chrome/ Brush Nickle3.Plating Thickness: copper 7-8um; Nickle:above 8um Chorme :0.3um totall thickness Above 12UM 4.Guarantee:5 Years Four towel bar