Get down deep, where the big fish are, with Opti-Tackle's Copper Trolling Line, and save time doing it by getting the "Ready Rigged" line that has the right knots already tied and is ready to wind on your reel and fish. This seven-strand, 30-lb. and 45-lb. copper line is excellent for trolling spoons, attractors, cut bait rigs, plugs, etc. Most often used on in-line planer boards, but not recommended for use on Dipsey or Thumper rods. The 30 lb. sinks approximately 5 ft. to 6 ft. for every 10 yards; the 45 lb. sinks approximately 7 ft. to 9 ft. for every 10 yards. That means 300 ft. of 30-lb. copper line would fish around 60 ft. in depth; 300 ft. of 45-lb. line would fish around 90 ft. depending on trolling speed, currents and the weight of bait.