NINJA Nymph Leader System, a streamline form strike indicator and Fluorocarbon leader, All in One system. Just add a desired tippet on a Tippet Ring, tie your favorite fly and cast! NINJA indicator, its unique feature "Slide & Hold" place on the 12 lb. test Fluorocarbon, makes easy and quickly to adjust the depth of water you want to fish. With a Tippet Ring, You can use any size (0X~9X) and length of tippet, makes easy to tie tippet to leader. A football-like, streamline shape of lightweight yet durable foam indicator cut air nicely, provide better casting performance. Small (good with size #18 and smaller flies with 1 #1~6 shots.)Medium (good with size #12~16 weighted flies with 1 AB, or 1 BB shots.)Large (good with size #12~16 weighted flies with 1 AB, or 1 BB shots.)