1/2" male pipe thread x 1/2" drip adapter, use to connect 1/2" drip tubing to a 1/2" pipe thread fitting unique release feature simplifies installation & maintenance, universal, this easy to push on adapter works on the most common sizes of 1/2" drip tubing, .690 & .710, included is a unique release tab that allows for removal & reinsertion of tubing for convenient installation & maintenance.