United Pacific - Competition Series Heavy Duty 12 Volt 140 PSI Air Compressor And Tank Kit - Heavy Duty Air Compressor And Tank System - 140 PSI For Air Horns, General On Board Air Applications And Off Road Use - High Volume Reciprocating Compressor With 1.5 Gallon Tank Permits Extended Air Horn Operation - Automatic On/Off Pressure Switch - Compressor And Tank Can be Stacked Together Or Mounted Separately To Accommodate Different Mounting Locations - External Screw Thread Hose Connector: 1/4 NPT And 1/8 NPT - Outer Diameter Hose Size: 1/4 Inches - Kit Includes: 12 Volt Air Compressor, Steel Air Tank With Safety Valve, Air Pressure Gauge, Air Hose, And Connector Fitting To Attach Most Air Horns And Mounting Hardware And Instructions - Sold As A Kit