Material: PE, steel 45#(for concrete, nail will never be curved) Color: White, black, grey Type: Round Cable Cl Cable ClipMaterial: PE, steel 45#(for concrete, nail will never be curved)Color: White, black, greyType: Round Cable Clip(Circle Cable Clip), Flat Cable Clip, Hook Cable Clip Round / Circle / Flat / Coaxial Cable Clip, Nail Clip