This is a single 100 or 200 Yd. spool of Multi-color lead-free lead core trolling line.  This is a 10 color line that is a great environmentally friendly alternative to traditional lead-core line.   

Product Specs: An innovative trolling line for deep lake and ocean fishing.  Lead free requires less sinker weight due to the continuous strand of lead free wire running throughout the line.  Approximate sink rate - 2 yards out =1 food depth.  After 25 feet of depth thermocline or extreme water temperature change affects lead free core sink rate.  Color changes every 10 yds.  Use the handy trolling depth chart on back of package to determine your approximate lure depth.