Reinz Coolant Pipe O - 703906100 - Reinz Coolant Pipe O is a high quality, robust product which provides reliable performance in all cooling systems. It is resistant to corrosion and oxidation and is designed to withstand extreme temperatures. The pipe is made from durable stainless steel and is easy to install. It is suitable for a range of applications and is a great choice for keeping your cooling system running smoothly.