3/8"x3/8"x1/4" Compression Brass Tee. It is a Lead-Free compliant product which meets Public Law 111-380. 3-way compression fittings, O.D. tube size. 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