Electro galvanized. Wide head aids holding and reduces pull through. For asphalt shingles, roofing felt, or insulating board. Galvanized to resist weathering. 11-gauge. Packaged in a 30 lb. pail. No. 1EGRFGBK: Finish: Electro Galvanized, Length: 1", Head Type: Wide Flat, Diameter: 11 ga, Head Diameter: 7/16", Package Size: 30 lb, Pkg Qty: 8160, Package Type: Pail No. 114EGRFGBK: Finish: Electro Galvanized, Length: 1-1/4", Head Type: Wide Flat, Diameter: 11 ga, Head Diameter: 7/16", Package Size: 30 lb, Pkg Qty: 6540, Package Type: Pail No. 112EGRFGBK: Finish: Electro Galvanized, Length: 1-1/2", Head Type: Wide Flat, Diameter: 11 ga, Head Diameter: 7/16", Package Size: 30 lb, Pkg Qty: 5580, Package Type: Pail No. 134EGRFGBK: Finish: Electro Galvanized, Length: 1-3/4", Head Type: Wide Flat, Diameter: 11 ga, Head Diameter: 7/16", Package Size: 30 lb, Pkg Qty: 4560, Package Type: Pail No. 2EGRFGBK: Finish: Electro Galvanized, Length: 2", Head Type: Wide Flat, Diameter: 11 ga, Head Diameter: 7/16", Package Size: 30 lb, Pkg Qty: 4320, Package Type: Pail No. 212EGRFGBK: Finish: Electro Galvanized, Length: 2-1/2", Head Type: Wide Flat, Diameter: 11 ga, Head Diameter: 7/16", Package Size: 30 lb, Pkg Qty: 3420, Package Type: Pail No. 3EGRFGBK: Finish: Electro Galvanized, Length: 3", Head Type: Wide Flat, Diameter: 11 ga, Head Diameter: 7/16", Package Size: 30 lb, Pkg Qty: 2760, Package Type: Pail