The 1/2"Tube X 1/2"Tube X 1/2"Tube Prestolok Brass Union Tee is 2.30" long, 1.15" center line to end, and has a .375" diameter flow. Materials of construction are nickel plated brass bodies, nitrile O-rings, polyacetal push buttons and stainless steel grab rings. Recommended tubing is LLDPE, PP, Nylon, and 90 A or 95A polyurethane tubing. Fittings are rated up to 300 PSI depending on tubing. Temperature range is 0°F to 200°F.