The VU4 4-Corner Valve Unit is engineered to provide the cleanest installation and most reliable operation on the market. This electronic solenoid valve unit inflates and deflates up to (4) individual Air Springs and has 1/4" female NPT threads, so you can choose what gets connected to the valve block. The robust internal solenoid valve architecture maximizes flow rates, provides bubble-tight sealing, and guarantees operation up to 200 psi for millions of cycles. All of this technology is housed in a unique enclosure design which routes each of the solenoid wires to a single weatherproof connector, eliminating typically loose wires. This not only improves the appearance, but it also guarantees proper operation for every installation. With an overall size of only 5.28"x 2.75"x 2.75" and the ability to survive harsh under vehicle environments.