1. Material: Low carbon steel wire 2. Length: 12-55mm 3. Diameter: 14 BWG to 6BWG 4. Shank: smooth, ring.... Type: Common High quality nails and competitive priceU Type Nails(Factory & Exporter)1, Material: Good quality carbon steel like Q195 Q235 2, Surface: Bright/Elec galvanized/hot dipped galvanized3, Dia: 1.5mm-3.0mm4. Length: 19mm-50mm U type nails