Electro Galvanized Ring Shank Plasti-Top Cap Nails feature a flexible round head that conforms to the surface making it difficult for damaging water to get under the cap. Ideal for a variety of applications including for roofing felt, sheathing, polyethylene, roll roofing, re-roofing, chicken wire and wire lathe. Product measures 7/8" and sold in 4/250 count.