PolarSeal ACA couplings are for use with Gates PolarSeal air conditioning hose. Offered in many of the most popular styles of aluminum couplings with select styles available in zinc-plated steel. Available in various bend angles and common stem sizes -6, -8, -10, and -12. Utilize Gates PolarSeal Portable Crimper, or one of Gates bench top crimpers, to make crimped AC assemblies using ACA couplings and PolarSeal hose.