Large diameter head, perfect for attaching roofing felt, slate and shingles. Approx. Pcs Per 1kg570CE Standard WebBS EN 14592:2008Corrosion Rating2 - Occasionally damp/wet, rural and sheltered areasDescriptionLarge diameter head, perfect for attaching roofing felt, slate and shingles. FinishGalvanisedHead Area mm49.99Head TypeRoundLength mm40MaterialCarbon SteelPack Dimensions L x W x H mm180 x 152 x 50Pack Weight kg0.520Point Length mm3.61Product CodeGCN40MBService Class2Shank Dia. mm2.65Size mm40 x 2.65SubstratesRoofingWeight kg0.5.