Yellow Jacket - PLUS II hoses have double barrier protection for CFC, HCFC and HFC refrigerants. The moisture barrier provides improved resistance to moisture migration which contaminates expensive refrigerant. 14 RYB PLUS II hoses are rated for 4000 psi (276 bar) minimum burst and 800 psi (55 bar) maximum working pressure and an operating temperature of -20 to 180F (-28.8 to 82.2C)