EK-ACF fittings are Advanced Compression Fittings designed for use with flexible soft tubing such as PVC, EPDM, Norprene, silicon or any other type of compatible flexible tube. EK-ACF Fittings are a more secure variant of the tubing fitting connector as the locking ring prevents flexible tube to be pulled out of the fitting by compressing the tubing wall underneath the ring. Such fittings do not require any hose clamps or similar substitutes.