Impact and UV resistant A4 Stainless Steel polymer headed nails, used for fixing soffits, fascias, roofline trims and where other aesthetic fixings are required. UV Stable Impact resistant" Shank Dia. mm: 3.2 Length mm: 50 Material: Austenitic Stainless Steel (A4-316) Colour: White Head Dia. mm: 12.0 Timco Polymer Headed Pins - Stainless Steel - White (Size 50mm - 25 Pieces)