Air Lift Performance 4-Way Manual Air Management System. Economical simple and accurate control for all 4 wheels. Great for use with gauge and pillar pods. The system provides a maximum pressure of 175 psi. Features a VIAIR 100% duty cycle 16444 Compressor 1/4 inch air line for accurate and smooth adjustment. Attractive stainless steel switch plate. This Kit Includes: Viair 444C Chrome Continuous Duty Compressor (200psi) 4 Gallon Aluminum Tank Air Line Two Dual-Needle Pressure Gauges 4 Paddle Valves Air Fittings and Air Line Cutter. Everything needed for installation.