Excellent Material----Constructed from premium aluminum material, not easy to corrode and fade, in most cases can improve its working performance. Excellent material----Constructed from premium aluminum material, not easy to corrode and fade, in most cases can improve its working performance. Application---- The 1-30 PSI is adjustable and features a closed loop ball and spring design. Locking nut to prevent adjustment changes. Safety nut avoids adjustment changes. Easy to use ---- It features easy-to-install hardware and accessories to provide a convenient and user-friendly user experience High Performance----It allows an exhaust bypass valve actuator to exhaust or vent to atmosphere or back into the intake system. Lightweight and portable ---- It is small, light, does not take up too much space, and is easy to place in the engine compartment.