1)Raw Material:Zinc-Alloy 2)Plating: Brush Nickel; Brush Black Nickel; Brush Brass; Brush Bronze; Brush Matte Black; Old Silver; Old Stannum, etc 3)Size:W30mm(with inside) 4)Size and colour is available base on your reqirement 5)Customer's samples and designs are welcomed 6)High quality,reasonable price and good service are our competitive advantages