WESTRON R134a refrigerant is a ubiquitous refrigerant used in many air conditioning applications. It is often packed in blue cylinders. Because of the nature of R134a's qualities as an HFC (hydrofluorocarbon) refrigerant, it has minimal ozone depletion potential and has a low greenhouse effect. R134a is an excellent alternative for R12, which has been employed in a variety of applications. uaehvac.com