SharkBite introduces 1/2 inches barb x 3/8 inches brass compression fitting. OD compression adapter is a brass adapter that controls water flow to household plumbing fixtures. SharkBite adapter 1/2 inches barb end can be connected to PEX pipe using copper crimp rings or stainless steel clamps. The 3/8 inches compression valve adapter with the supplied ferrule and compression nut can be used with 3/8 inches OD pipe or 3/8 inches supply line. SharkBite fitting or plumbing adapter is made of lead-free content. This plumbing fitting is best suited for use on toilets, faucets, and dishwashers.