Robinair's 31078 Premium Refrigerant Charging Hose features a 500 PSI working pressure and 2500 PSI burst pressure - ideal for standard refrigerants. Rugged neoprene coating offers flexibility and wear resistance ensuring long life and dependability. 1/4" x 72" long yellow hose features 1/4" female flare fittings, with a valve core depressor and 45° bend on one end for convenient access to the system. Coupler nuts feature deep knurling for a positive grip that enables quick finger-tightening. Hose ends feature a strong six-sided crimp that provides a secure, reliable connection between the hose and barb - even at maximum pressure. Robinair, a Bosch Automotive Service Solutions brand, is a global leader in service tools and equipment based in Owatonna, Minnesota. Robinair is recognized throughout the world as the quality and performance leader in AC/R evacuation tools and this position has led to its success with the full range of products that serve the heating/ventilating/air conditioning/refrigeration (HVAC-R) and mobile markets, which includes the automotive aftermarket along with other industries such as agriculture and construction.