The Haldex 1/4" Control Port Two-Way Check Quick Release Valve is designed to provide reliable performance and high efficiency. It features an oil resistant diaphragm and disk to ensure long-lasting service. This valve consists of one exhaust port, two delivery ports and one supply port. It also comes with optional noise reducing foam crossers or silencers for added convenience. This valve is stringently evaluated to ensure it meets the highest standards of quality and performance. FleetPride is your First Click in Heavy Duty®.