3/4" drain cables are perfect for large main line drains. Duracable 3/4” cable is available in hollow core and inner core styles. Hollow core is our most popular cable type, however, inner core cable gives the cable a stiffer feel for longer runs. The stiff wire makes the cable stronger and more rigid than standard inner core cable. Because of the strong nature of the material, the cable pushes like a rod through line blockages. Our 3/4” DuraFlex cable can be used in a variety of Duracable drain machine models (DM175 and DM55). Duracable manufactured drain cables can also be used with most other brands of drain cleaning machines.