... Black nickel plating surfaceReal factory priceOrther cap size: Full range size available NameValueMaterialBrass or IronColorShining Nickel,Black nickel, ... gold,antique brassSizeOUter Diamater 9.8mm, Inner 5mm, Height ... ring and etc)5.Orther metal products apply on garment, shoe, luggage,belt. 9.8mm outer size round ...