Roofing Nails 1)size:10BWGX2.5' 12BWGX2', 2)documents:Soncap,CTN NO. ... 4)smooth shank Roofing Nails1) Product name: umbrella head roofing nails 2) Size: 2'X12BWG,2.5'X10BWG,3'X9BWG3) Finish ... on customers'request. Electro Galvanized Umbrella Head Twisted Shank Roofing Nails(factory,SGS certificate,Soncap)