This is the replacement silicone tubing for your water lines inside an Isomac and Quick Mill espresso machine or for that matter many semi-commercial espresso machines. Silicone tubing has a tendency to dry out and become brittle over time, especially when subjected to heat for prolonged periods of time. It's a good idea to check the condition of your tubing every now and then and replace it as needed before leaks occur.
Note: This tubing is priced and sold by the foot. If you order QTY of 3 you will receive a single three foot long piece.