RIO&&';;s iMOW tips have an intermediate section, instead of a floating, which creates a smooth depth transition between a floating body and fast sinking tip, and perfect contact between the angler and the fly, they are also the ideal tip for intermediate based Skagit heads, like RIO&&';;s iFlight. There are three weight series (Light, Medium and Heavy) and four tips within each series, as well as a complete kit with all 4 tips of a series packaged in a RIO leader wallet. Light iMOW Tips feature T-8 for a sinking section (with a sink rate of about 7" per second) and are most suitable for Skagit lines of 475 grains and less. Medium iMOW Tips feature T-11 for a sinking section (with a sink rate of about 8" per second) and are most suitable for Skagit lines between 475 and 575 grains. Heavy iMOW Tips feature T-14 for a sinking section (with a sink rate of about 9" per second) and are most suitable for Skagit heads of 575 grains and heavier.