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This replacement HVAC heater hose assembly is engineered to match the fit and durability of the stock heater hose assembly on specified vehicles. It is designed to withstand extreme temperature changes to extend service life. All Dorman products are engineered in the United States and backed by 100 years of automotive aftermarket experience. Inside Diameter In||0.62 In. Hose End 1 Outside Diameter In||1.05 In. Hose End 2 Inside Diameter In||0.62 In. Hose End 2 Outside Diameter In||1.05 In. Hose End 3 Inside Diameter In||0.68 In. Hose End 3 Outside Diameter In||1 In. Maximum Working Pressure psi||100 PSI