Ridgid® C-2 Drain Cable, Cable Type: Inner Core, Steel Construction, Drain Line Capacity ID: 3/4 to 1-1/2", Connection Size: 3/4", For Use With: K40/71722, K-39B-1, K39/68057, K-39AF, K-50-8/59000 Drain Cleaning Machines, Includes: Drop Head Auger, 25 ft. Maximum Run, 1 Piece, Size: 5/16"