Express Nails (Spring Anchors) Material:Steel Size:5*30,5*50,6*30,6*40,6*80, 8*70,8*90,8*180 ... Express Nails (Spring Anchors) Material:Steel Size:5*30,5*50,6*30,6*40,6*80, 8*70,8*90,8 ... is resistant to chemicals, fungus, moisture and other atmospheric conditions.3.Electrical and thermal properties are excellent. Thermal resistance ranges from ...