Our Commando sink tips come in 5, 7.5, 10, and 12 foot lengths. Within each length and grain weight, they come in three different sink rates, which we call Riffle, Run and Bucket, for shallow, medium depth and deep water. The exact sink rates within those three categories will vary based on length and grain weight, so not all Bucket tips are the same across grain weights, but the three sink rate within each grain weight system is a constant throughout our sink tips. This means that you can get a deeper-sinking tip or a shallower tip with the same tip grain weight, so you don?t have to change your cast to fish different depths of water. For example, all of our 5 Foot Micro Tips?the Riffle, Run, and Bucket, all weigh the same, even though there are three different sink rates, or densities.