These transparent lines by Helix can be used as carburetor vent lines or overflow hoses. They are made from premium polyurethane with a hardness of 85 durometer, which provides for superior resistance against abrasions, kink, tear, oxidation and chemical influences. It has a melting temperature of 188°C and an operating temperature range of -59° to +68°C. This line material will not get hard and stays flexible.