Product Description Description: Features built in safety valve and neoprene gasket for leak-proof operation. Screw on design, and easy to use. For car service professionals and the do-it-your-self handymen Product Name: Can Tap Valve Apply to R-12, R-134A, R-600a Material: Metal Packing quantity: 1 If there is anything you need, Please contact with us. There are a variety of Size available but they are not all listed.