umbrella roofing nails SpecsModel: 13G,12G,11G,10G,9G,8G Length:1-3/ ... "-3" Diameter:2.50mm-4.10mm material:Q195 carbon s umbrella roofing nailsSpecsModel: 13G,12G,11G,10G,9G,8G Technical Standards: Length ... in our products , pls contact with me directly:0086-15965792612 umbrella roofing nails