Viking Horns V1003AT 1.5 Gallon Air Tank for Air Horn System Tank Size: 1.5 Gallon (5.6 Liter) Made from heavy gauge steel painted black Storage: Max air pressure 165 psi Tank Dimensions:17" L, 7-1/2" H, 5-1/2" dia. Ideal for air horns that require an on-board air system