Robinair's No. 69060A Enviro-Guard residential A/C service hose set features a special barrier material that prevents virtually any permeation of refrigerant yet still remains flexible - ideal for use with high pressure systems including R-410a. Durable 60" long yellow, blue, and red hoses are rated at 740 PSI working pressure, 3700 PSI burst pressure. Brass 'Quick Seal' 1/4" female flare fittings on both ends - straight fitting on one end, convenient 45 degree fitting on the other. 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.