The Bulldog Winch 2-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#: 42004. Ten total bungs provide numerous attachment points Two 3/8"" female NPT ports Four 1/4"" NPT bungs located around center circumference | Bulldog Winch 2-Gallon Air Tank with 10 Bungs in Black