Robinair (68196A Enviro-Guard Hose with 45&deg; Quick Seal Fittings - 96", Yellow Enviro-Guard residential A/C service hose features a special barrier material that prevents virtually any permeation of refrigerant - ideal for use with R-410a and other high pressure systems 96 inch long, 1/4 inch yellow hose; 740 PSI working pressure; 3700 PSI burst pressure Brass 'Quick Seal' fittings - 45 degree on one end, straight on the other - provide a leak-free seal 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