Commodity Quality Certification:3cSize:Diameter:14mm,17mm,19mmMaterial:Nature HairOrigin:Mainland Materials 1:Grey Goat HairMaterials 2:Black Chungking BristleMaterials 3:White And Black Horse Hair MixDiameter 1:14mm(9/16")Diameter 2:17mm(11/16")Diameter 3:19mm(3/4")Shank Diameter::2.35mm(3/32")Application: Lab And Jewellery Making ToolsMarket::Popular In Usa Market Lab