Hitachi 3-1/2 In. X 0.131 In. Full Round-head Hot-dipped Galvanized Plastic Strip Framing Nails (4,000-pack) 4,000-pack Full Round-Head Smooth Shank Hot-Dipped Galvanized Plastic Strip Framing Nails Measures 0.131 in. in diameter x 3-1/2 in. in length