Barrier Air Conditioning Hose is a very common A/C hose used in cars and trucks.   Barrier hose is a heavy-walled rubber hose with a nylon liner to prevent the permeation of refrigerant.  Ideal for R134a and R12 systems, barrier A/C hose is commonly used with beadlock fittings that are permanently crimped onto the hose.   Please inquire about custom made A/C hoses, fittings, and crimping equipment.