The 3/8"Tube X 3/8"MNPT Brass Prestolok Male Swivel Elbow is 1.01" center line to push-to-connect end and 1.24" center line to threaded end with a 11/16" hex and a .250" 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.