MegaCrimp® couplings give you a leak-proof seal that's so innovative, it's patented. It's what's inside the MegaCrimp coupling that makes it perform so well, the "C" insert. This "C" insert allows usage with different constructions and wall thickness. In addition, the "C" insert ensures an even distribution of crimping forces to form a concentric seal. That simplifies your inventory requirements since one size can accommodate many different hose ODs, on both one and two-wire hoses. An additional bonus: MegaCrimp™ couplings are a fully qualified EN-performance coupling.