Enzotech high quality nickel plated 45 degree rotary fitting is compatible with 3/8" ID tubing and G1/4" thread type. Also included is an integrated O-ring for perfect sealing. Tubing ID 3/8" Tubing OD 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.