Amazon.com: 20-Pack USA Made - Drip Irrigation Brown Barbed Adapter Coupling Fittings - Fits 1/2” Inch, 17mm .600” ID Drip Tubing - Made In The USA : Patio, Lawn & Garden
Habitech Irrigation Fittings Kit for 1/2" Tubing
DIG 1/2 in. 0.710 OD Compression Coupling C43 - The Home Depot
Rain Bird EFC25-1PS Tubing Coupling, 1/2 in Connection, Compression, Plastic, Black D&B Supply
Rain Bird 1/2 in. Barbed Couplings (4-Pack) BC50/4PKSX - The Home Depot
Drip Irrigation 1/2" Tubing Coupling Fittings 17mm Barbed Coupler Connectors for 1/2 Inch Irrigation Tubing 0.600" ID Drip Line
DIG 1/2 in. Barbed Elbow (10-Pack) CB76-10 - The Home Depot
Amazon.com: Habitech 1/2" Coupling Drip Irrigation Fittings (12 Pack) - Barbed Drip Line Coupler Connectors compatible with Rain Bird and Most 1/2" Tubing or Sprinkler Systems : Patio, Lawn & Garden