BOSTITCH C3R80BDG Thickcoat Round Head 1-1/4-Inch by .080-Inch by 15 Degree Wire Collated Ring Shank Coil Siding Nail (4,200 per Box) 1 1/4" x .080 Ring Shank Thickcoat Galvanized Finish 4200 Nails Per Box For Use in the Bostitch N66C-1 Industrial Siding Nailer