Designed for use with R12 and R134A refrigerant systems only, the Dayco Style BH/DBH Barrier Refrigerant Hose features nitrile/nylon barrier/neoprene tube construction, , textile reinforcement, and black EPDM cover that is resistant to abrasion, ozone, and heat. It meets SAE J2064 (exceeds J51) type C requirements. The temperature range is from -22˚ F to +203˚ F. This hose is recommended for use with Dayco coupling styles BL and SB.