68121A Robinair 36" Red Quick-Seal Enviro-Guard Tank Hose R12. Enviro-Guard Hoses for Automotive R-12. Enviro-Guard Hoses are constructed of special barrier material which prevent virtually any permeation of refrigerant, yet remains flexible. Meet all specifications for low permeation construction. 740 psi working pressure, 3700 psi burst pressure.
