The patented ?C? insert pre-assembled MegaCrimp coupling gives world-class, leak-proof performance. It is designed with a patented ?C? insert attached to the ferrule that accommodates hose of different constructions and wall thicknesses. The insert?s design ensures crimping forces are evenly distributed to form a concentric seal. The ?C? insert simplifies inventory requirements since one MegaCrimp coupling size can accommodate various hose outside diameters, on both one- and two-wire braid hydraulic hose.