This 2-way Type T/P (thermostatic/pressure balance) coaxial valve rough PEX Riobel 289665 is a high-quality valve designed for use in water and gas systems. It is made from PEX tubing, which is a durable and corrosion-resistant material, and it features a rough surface that helps to reduce friction and improve performance. This valve is perfect for use in systems that require high-quality performance and durability, and it is also compatible with a variety of fittings and valves. This 2-way Type T/P (thermostatic/pressure balance) coaxial valve rough PEX Riobel 289665 is a high-quality valve designed for use in water and gas systems. It is made from PEX tubing, which is a durable and corrosion-resistant material, and it features a rough surface that helps to reduce friction and improve performance. This valve is perfect for use in systems that require high-quality performance and durability, and it is also compatible with a variety of fittings and valves.