Enzotech high quality nickel plated 90 degree rotary compression fitting is compatible with 3/8" ID and 1/2" OD tubing and G1/4" thread type. Also included is an integrated O-ring for perfect sealing. Tubing ID 3/8" Tubing OD 1/2" Thread Type: G1/4" Finish: Nickel Plate (Metallic Silver) Disclaimer: All of Enzotech rotating fittings are not designed for constant or periodical movement of the fitting. If subject to that, warranty will be voided.