Designed for use with 1/2-inch drip irrigation tubing, Rain Bird barbed couplings push together and grab onto the tubing to provide a secure and leakproof connection. They’re designed for use with any tubing brand when you need to connect two lengths quickly and easily. These barbed couplings help you create your own custom layout to fit your garden’s planting areas. The unobtrusive brown fittings are camouflaged among your garden’s natural earth tones.