Build, repair, or expand your drip irrigation project with the 1/4 in. Barbed Coupling. The micro fitting connects 2 sections of 1/4 in. supply tubing or dripline together, or connects a 1/4 in. feeder line to a punched hole on a supply line. The single-barbed coupler has an extended barrel length making it easier to grip to insert into tubing. If you have trouble fitting it into tubing, try soaking the tube opening in hot water or leaving out in the sun to soften the material. Micro fitting is reusable and made of acrylonitrile butadiene styrene (ABS).