Parker A-Lok 4ET4-B Brass Compression Tube Fitting, Tee, 1/4" Tube OD Branch tee to connect tubing on the run ends and on the branch Fitting connects to tubing on all ends Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability Twin ferrule compression fitting for a leak-resistant seal in high-pressure applications For use with copper tubing