Material is High temperature resistant Polyamide. Color is grey (RAL 7037), black (RAL9005). Flame-retardant is HB (UL94), according to FMVSS 302: <100mm/min. flexible and excellent tenacity, medium wall thickness, glossy surface, wind resistant, high mechanical ,resistant to oil, acid and solvents, anti-friction, black tubings are UV-resistant, free of Halogen, phosphor and cadmium, passed RoHS.. Temperature range is min-40℃, max150℃, short-term170℃.