"Light" InTouch iMOW tips feature T8 for the fast sinking section (which sinks at 7" per second) and are ideal for Skagit heads up to 475 grains. The intermediate section is a translucent white. "Medium" InTouch iMOW tips feature T11 for the fast sinking section (which sinks at 8" per second) and are ideal for Skagit heads between 475 and 575 grains. The intermediate section is a translucent green. "Heavy" InTouch iMOW tips feature T14 for the fast sinking section (which sinks at 9" per second) and are ideal for Skagit heads between 575 and 675 grains. The intermediate section is a translucent blue.