Kleinn Air Horns 6450RT Air Tank - 5-Gallon Capacity is a replacement Air Tank for the Kleinn Air Horns 6450 Air System. Featuring a Mild Steel Construction and an attractive Black Powdercoat Finish this Kleinn Air Horns Air Tank - 5-Gallon Capacity is also Internally Coated. Engineered with a Tank Capacity of 5-Gallons and includes Seven 5 x 1/4-Inch NPT and 2 x 1/2-Inch NPT this Kleinn Air Horns Air Tank - 5-Gallon Capacity is the perfect replacement piece. Too Loud? Too Bad!