19311 Robinair 36" Blue Double Quick-Seal Enviro-Guard Tank Hose 1/4" Flare. Enviro-Guard Hoses for Automotive R-12 and other gasses. 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.
