Rain Bird BC50/4PKS Drip Irrigation Universal Barbed Coupling Fitting, Fits All Sizes of 5/8", 1/2", .700" Drip Tubing, 4-Pack Connector for use with 1/2" and 5/8" Drip irrigation tubing Barbed ends grab tubing for a secure leak-proof connection Allows creation of a custom layout for your planting area Compatible with all 1/2" Drip irrigation tubing measuring from .580" to .700" outside diameter Constructed of highly durable UV and chemical-resistant materials to assure long life Recommended for 0 to 50 PSI operating pressure 4-pack of 1/2" barbed Coupling connectors in convenient plastic bag