The 1/8 in. Barb Coupling connects two sections of 1/8 in. distribution tubing (A185). Coupler fits inside drip tubing and anchors into place. Fittings connect to nursery tubing to set up a new drip irrigation system or expand or repair an existing drip system. This micro fitting is made of ABS plastic treated with UV inhibitors to prevent fading or cracking. Use fittings to set up a new drip irrigation system, expand an existing system, or make repairs.