Technical description Spiral tube for air brakes, the tube that is made up of a mixture of both ester and ether-polyurethane, have very high resistance against wear, UV radiation and microorganisms as well as extremely good ageing resistance. Highly flexible at low temperatures. Kink-free. DIN 73378 and Din 74324-1. Material Polyurethane, ester, ether, PU 98° shore Working pressure The maximum recommended working pressure is 12-16 Bar. Temperature range -40 - +70°C