Roofing Nails/Umbrella Head Nails Material: Q195,Q235 Certificate: ISO9001:2000 Special Manufacturer&Exporter Available Sizes SpecificationTwisted or Plain Cap Diameter9# x 2-1/2,2,3Twisted or Plain 20mm10# x 2-1/2,2Twisted or Plain 20mm12# x 2,1-1/2Twisted or Plain 18mm13# x 1-3/4,2,1-1/2Twisted or Plain 15mmFinish : Electro Galvanized, Hot-Dip Galvanized, Copper , Stainless Steel, Plastic Cap, ...