RIOs InTouch Skagit iMOW Heavy Tip lines have a T-14 sinking section that sinks at approximately 9 per second, so your flies sink fast and reach the strike zone quickly. The intermediate section creates a smooth depth transition between the floating body and fast-sinking tip, while RIOs ultralow-stretch ConnectCore allows the angler to feel every single touch. Ideal for use with Skagit heads of 575 gr. and heavier. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Tips.