AC Hose Type E 1/2 Inch SAE J2064 for R134A Automotive AC System JUNZ

SAE J2064 Type E AC Hose from JUNZE is a 4-layer hose built to keep refrigerant where it belongs — inside the system. The 1/2 inch (12.7mm ID) uses a nylon barrier layer, synthetic rubber tube, textile reinforcement, and a heat/ozone resistant outer cover. So here is the question most buyers ask: does the 4-layer construction actually reduce permeation? We tested it. In a 500-hour sealed loop at 80°C, the Type E hose lost 0.8 grams of refrigerant per meter. A standard 3-layer non-barrier hose lost 6.2 grams under the same conditions. That is 87% less loss. Rated for 3.5MPa working pressure with minimum burst pressure of 15.0MPa (BH series). Operating temperature range from -40°C to +135°C. The 1/2 inch size works for both suction and discharge lines in sedans, SUVs, and MPVs. Low permeation and consistent performance — that is what this hose delivers.