Medium-Stiff Tapered Leaders With A Tough Fluorocarbon Shock Tippet. RIO's light saltwater shock leaders featurea tough fluorocarbon shock tippet that protectsthe leader from teeth, gill plates and spines,and are ideal for snook, small tarpon and similar“problem” species. The main body of the leaderis made with a stiff nylon that tapers down to16lb before being tied to the shock tippet. Each leader is 10ft long and available with either 15lb, 25lb or 40lb fluorocarbon shock tippet.