The flexible HDC720HD 7.8mm hybrid fiber cable is 16 percent smaller and 40 percent lighter in design. The revolutionary construction of the HDC720HD starts with replacing the typical heavy steel strength member with a Kevlar strength member that has the same pull strength of steel, but is lighter and more flexible. Unlike steel, Kevlar expands and contracts at the same rate as the glass members during temperature extremes, keeping the elements in the cable aligned reducing migration. Using Kevlar in place of steel also means the cable has virtually no memory, making the cable easier to pay off, lay flat and wind back up on the drum.