From the Manufacturer

King Brothers Inc. CPC-0750 3/4-Inch Compression PVC Compression Coupling, Gray
Branch off the main supply line to create a feeder line that supplies water to a low-flow, drip-watering device, or use as a main line in a small drip irrigation system; for trees, shrubs, flower beds, vegetable gardens, planter boxes, and hanging baskets
Tubing outside diameter (OD) is 0.250 in., internal diameter (ID) is 0.170. in.; connect to main supply line with 1/4 in. micro fitting such as a barbed connector, connect other end directly to emitter to deliver water to plant
As part of a complete drip irrigation system, the supply tubing transports water to the area to be irrigated; Tubing coil comes shrinkwrapped for convenience; easy to access as needed
Poly tubing is constructed using a layering method for durability: the outer layer, which is exposed to the sun, and the inner layer, which is exposed to water, is made of 100% virgin content; the middle layer is composed of recycled content
Comes with one 25 ft. coil of 1/4 in. poly supply tubing