This commercial grade 3/4" male adapter x 1/2" Spin-Loc connector is used to connect a .700 OD drip tubing to a main lateral with a 3/4" FPT. To use this Spin-Loc fitting, push the drip tubing over the barb with the "O" ring and thread the sleeve over the drip tubing to secure. The tight seal for the Spin-Loc fittings is ensured by the rubber "O" ring on the barb, which provides a quality water-tight connection.