JINKAI PREMIUM QUALITY MONOFILAMENT COMMERCIAL TROLLING LINE This line is a breakthrough in monofilament technology, due to the extrusion technique which polarizes the nylon molecules maintaining a soft center with a tight outer surface. The line is extremely sensitive and responsive, yet provides incomparable toughness and strength in micro-line diameters. Custom-designed large-core 7" spool allows line to straighten easily. The choice of commercial fishermen worldwide! Most weights available in Clear or Smoke Blue. Length varies depending upon line weight.