Die Cut, UV resistant Medical Grade Mylar will not discolor or breakdown in sunlight. Use with a Kink-Shank hook to make extremely effective "crank-bait" type patterns that will fool even the wariest fish. Finally a fly that really "swims" with a side-to-side wobbling motion like a crankbait is now within your grasp. Size Small for #4 through #1/0 hooks and Size Large for 2/0 to 5/0 Hooks - 10 per package. Red border on Lips in Photo for display only, the Lips are completely clear.