1/2" dl end cap, use to seal the end of 1/2" distribution tubing, removable end cap for winterizing or system flushing, unique release feature simplifies installation & maintenance this easy-to-push-on end cap works on the most common sizes of 1/2" drip tubing, .690, .700 & .710, included is a unique release tab that allows for removal & reinsertion of tubing for convenient installation & maintenance.