The length of foot is a need of buoy design, which mainly plays the role of counterweight. Adjust the center of gravity of the buoy and stand upside down is the best position. The feet are long and thin, and the target is stable. High sensitivity. Compared with thin short feet, the sensitivity of thick short feet is higher. Because the design concept is different, the use is of course different. Stubby feet are used to float and catch fast fish.