Includes 2 3' charging hoses and lowside snap coupler. Used for 134a systems. Remove the lowside snap coupler for use with R12 and R22 systems. Works with Enviro-Safe cylinders. This manifold is used with Enviro-Safe tanks of refrigerants and with R134a systems. It CANNOT be used with Enviro-Safe Refrigerant small cans without purchasing additional items.