5/16" Flarex1/4" MIP Brass Half Union Adapter. It is Lead-Free compliant, meeting Public Law 111-380. Low lead O.D. tube sizexMale I.P.S. Manufactured to include no more than 0.25 % weighted average lead content on wetted surfaces.
WARNING: This product can expose you to lead, a chemical known to the State of California to cause cancer and reproductive harm. www.P65Warnings.ca.gov