BOSTITCH C8R90BDG Thickcoat 2-1/2-Inch by .090-Inch 15 Degree Ring Shank Coil Siding Nail (3,600 per Box) This product is easy to use This product is highly durable This product is manufactured in China 2 1/2" x .090 Ring Shank Thickcoat Galvanized Finish 3600 Nails Per Box For Use in the Bostitch N66C-1 Industrial Siding Nailer