coil roofing nails material:Q195 Diameter:0.12, Length:0.75-1.75" Finish:polish,bright,E.G,H.D.G,Shank:smooth,screw Coil Roofing Nails1,Material: Iron , steel2,Shank: Screw, Ring, Smooth.3,Diameter: From 0.083''(2.1mm)--0.131''(3.33mm)4,Length: 1''(25mm)--4''(100mm)5,Degree: 16°6,Surface treatment: Polished, Coated, Galvanized7,Per Box: 200*20, 225*20, 250*20, 300*30, 300*40, 400*40