Features and Benefits: * These heavy duty hoses stand the test of time * Knurled brass nuts make finger tightening easy * All are available in sets and individually * Sets include one blue, one red, and one yellow hose * Tested for working pressure of 750 PSI and burst pressure of 3000 Crimped with 8 segment dies for secure fit and maximum durability. Nylon barrier models meet EPA, SAE and UL standards for containment of refrigerant. Standard hoses are an economical alternative.