Stranded cable is soft multi-strand copper wire that has been blackened to simulate wire rope. It can be used in logging, ship, military, industrial, truck and railroad models.
Each package contains one 20' coil of .015" diameter 7 strand wire. Drill size 78, corresponds to 2.5" diameter in N, 1.25" diameter in HO, 1" diameter in S, and 1/2" diameter in O.