Airflo’s FLO tips are designed for a smooth transition from your line to your tippet with 2.5 feet of intermediate material followed by 7.5 feet of tungsten sinking material. There are 4 different tips to choose from so that you can really dial in your swing for the speed and depth of the water you are fishing. You can choose between T7, T10, T14, and T18. You can also purchase the entire set, which includes all 4 tips plus a free zippered wallet to store them in.