The Bulldog Winch 2.5-Gallon Air Tank lets you store and transport compressed air for your on-board air system. The steel tank has a black e-coating for maximum corrosion protection. Ten total bungs provide numerous attachment options, including two 3/8 female NPT ports and four 1/4 NPT bungs located around the center circumference â for mounting the tank with feet in 4 different positions â with a drain cock positioned at the bottom. Model#: 42005. (2) 3/8"" female NPT ports; (4) 1/4"" NPT bungs located around center circumference Tank dimensions: 20-1/4"" long x 7-1/8"" wide x 8-3/8"" tall Mounting bracket dimensions: 5"" long x 1-3/16"" wide | Bulldog Winch 2.5-Gallon Air Tank with 10 Bungs in Black