Viking Horns V1002ATK 1/2 Gallon Air Tank Kit for Air Horn System Tank Size: 1/2 Gallon (2 Liter) Storage: Air tank max 120 psi Material: Painted heavy gauge metal housing Dimensions:5-1/2" wide, 7-1/2" high (with bracket), 5-3/4" Long With Air gauge, air pressure switch, air hose, hardware, and fittings