NIBCO 1/2" x 3/8" Reducing Copper Coupling with Stop is designed for connecting copper pipes with a secure stop feature. This coupling allows for a smooth and reliable copper-to-copper connection, ensuring a tight fit. It comes complete with a sweat/solder fitting, making installation straightforward and efficient for your plumbing needs. This product provides durability and ease of use for reducing pipe sizes in your system. Model Number: W00730D