ACDelco Professional, premium aftermarket Air Brake Hoses are designed to accept all styles of air brake couplings, including conventional brass and plastic couplings for many vehicles on the road today. Their computer-controlled manufacturing process ensures maximum product uniformity. They are composed of superior EPDM rubber that resists the damaging effects of ozone and heat, plus harmful grease and oil common to air brake systems. ACDelco Professional Air Brake Hoses are temperature rated from -40 degrees Fahrenheit to +212 degrees Fahrenheit (-40 degrees Celsius to +100 degrees Celsius) and are flexible and kink-resistant. These premium aftermarket replacement air brake hoses are manufactured to meet your expectations for fit, form, and function.