... Shank:Smooth and Ring Material:Wire Rod,SS304,SS316,etc. Roofing NailsSpecsModel: 1/2",3/4",7/8",1",1-1 ... 3" Length:1/2"- 3"Shank Diameter:8-13GAUsed for Roofing with Diamond point.Finish:Bright and Electric Galv and HD Galv ... 39BWG×2.510BWG×2.58BWG×49BWG×310BWG×3H.D.C roofing nail main parameter8BWG×29BWG×1.510BWG×1.758BWG×1.59BWG ... .02mm.12BWG denotation dia2.8mm. 13BWG denotation dia2.38mm roofing nail