This Orbit PVC irrigation pipe coupling has a -inch FNPT (Female National Pipe Thread) connection for easy attachment to garden sprinkler heads and underground sprinkler pipes. This Orbit sprinkler part is durably constructed of gray schedule 40 PVC that is high in quality to guarantee many years of dependable use. With such high-quality construction, this is one sprinkler system part that will last and provide excellent lawn watering dependability. It is easy to install and use and requires no special tools for attachment. Has -inch female threading Easily connects to inground irrigation pipes and yard sprinkler heads Gray schedule 40 PVC construction is of high quality