This easy-to-push-on Elbow works on the most common sizes of 1/2" Drip tubing (OD.690 & OD.710). Included is a unique release tab that allows for removal and reinsertion of tubing for convenient installation and maintenance.Tubing easily inserts into elbow Unique release feature simplifies installation and maintenance Universal - Works with the most common sizes of 1/2" Drip tubing (.690 and .710)