hilmor 1839117 R12-22-502 4-Valve Manifold Built with a forged aluminum body and designed to be leak-resistant with replaceable stainless steel valve seats Get faster vacuum pulls with a true 3/8" bore throughout the valve A rubberized handle makes it easier to use in wet and dirty environments Offers easy access with front-mounted hose positions and a permanent location for temperature clamps A pressure reminder allows you to set the pressure ring and reference it later