1/2" x 3/8",chrome finish, lead free evo pex angle stop, quarter turn, full port brass ball valve, use on stub outs coming out of the wall, compatible with pex pipe only, no crimp, clamp, pex rings or special tools required, green visual indicator shows pex pipe is inserted to the proper depth, approved for underground & behind the wall applications with no access panels, use to control & shut off water flow to fixtures or appliances for maintenance & repair, quick installation, securely & permanently connect different sized pex pipe together, can be rotated after connected, ideal for working in tight spaces.