Ek acf rotary fitting advanced compression fitting is a soft tube compression fitting designed for use with flexible soft tubings such as pvc epdm norprene silicone or any other type of compatible flexible tube compared to the ordinary acf fittings the special feature of this fitting is its ability to rotate full circle which gives extra flexibility during the building of the cooling loop this type of fitting has extra benefits for users that often change their hardware and need extra flexibil