... , Flutes 5.Finish:polish,E.G.,H.D.G. Roofing Nails With Umbrella Head Material Raw:Q195,Q235,etc.Size: Diameter ... Types: Skew Fluted, Square, Spuare Twisted, Spiral,Smooth,Fluted,etc.Surface Finishing:Bright , Electro/Hot-dip Galvanized, Colour EG, Black,etc. BWG84 ... package(20-25kg/box)Application:chained & Fixed Hot-dip Roofing Nails With Umbrella Head