370 Yards of .016" Dia, 15-lb Test Eagle Claw&reg; Monofilament Fishing Line. It's Monofilamental Fishing is monofilamental. Which means you need this reel of 370 yards of .016" dia, 15-lb test Eagle Claw monofilament fishing line. Part of Mike and Joe's Bulldog" Brand Tackle line. Hangs pictures, too, and is right handy for hanging stuff that weighs less than (15) pounds in windows when you don't want to see the wires.