The 1/8" Tube x 1/8" Tube x 1/8" Tube Brass Compress-Align® Union Tee is 1.68" long with a .84" center line to end on all ends and a .093" diameter flow. The compression end has 5/16-24 straight thread. Both fitting and nut are brass. Fittings will work with copper, aluminum, TFE, FEA, PFA, or thermoplastic tubing. Temperatures range from -65°F to 250°F. Maximum pressure is 2,800 PSI.