Firestone Air-Rite Xtreme Duty Air Control System - Single Classic Gauge. Simply connect a kit to a compressed air source and you can inflate or deflate your springs in mere minutes. However do not make the jump and think you can just hook up Air-Rite Xtreme Duty Air Control System for Singles with twin gauges and start pumping. This two-gallon system is ideal for heavy-use applications such as Class A and B tires on large-tired vehicles. The classic gauge design adds a nostalgic touch; you'll want to keep this device forever. Air your up with a Firestone Air-Rite Air Command System for RVs and trucks immediately for an amazingly comfortable ride. Features of Firestone Air-Rite Xtreme Duty Air Control System - Single Classic Gauge Refer to manufacturer instructions for proper installation and verification of complete parts Two-Gallon Air Tank Hardware/Parts included Package Contents: Firestone Air-Rite Xtreme Duty Air Control System - Single Firestone 2543: Air-Rite Xtreme Duty Air Control System - Single Classic Gauge