17 mm barb x 1/2" NPT Adapter for dripline systems. •High quality barbs grab tubing for a secure fit •Unique barb design to reduce insertion force and still retain a secure fit •Non-obtrusive colored fittings to compliment natural earth tones •For use with poly pipe •Durable •Great for running a line along a row of potted plants •Connects 2-sections of tubing •Drip irrigation reduces water usage by up to 70% compared to conventional sprinkler irrigation •Fitting is made of ABS, a type of plastic, treated with UV inhibitors to prevent cracking