Firestone Air-Rite Heavy Duty Air Control System - Dual Classic Gauge. Choosing among the Air Command products has now become easier. Heavy Duty Air Command is ideal for regular use 8-lug or RV and wide load ranges. Features of Firestone Air-Rite Heavy Duty Air Control System - Dual Heavy-duty sturdy construction Compressor included Includes all hardware/parts required for installation Maximum pressure per square inch: 150 Package Contents: Firestone Air-Rite Heavy Duty Air Control System - Dual Firestone 2219: Air-Rite Heavy Duty Air Control System - Dual Classic Gauge