Detailed Product Description Umbrella Roofing Nails :SpecsModel: 13G,12G,11G,10G,9G,8G Production Place:JIN TENG DA Co., Ltd. Technical Standards: Length:1-3/4"-3"Shank Diameter:2.50mm-4.10mm Packaging:Common mode-20KG/ctn and 25KG/ctn ,or according to customer's request.