The Airtime Kite U-Stick Universal Strut bladders fit all kites and come in different sizes. The struts are made to be replaced by yourself if you have a ripped or flat strut. Measure your old strut and choose the size which comes the closest to it (better a bit longer instead of shorter). Choose the right valve with the bladder. You can easy place them yourself so you're ready to go on the water in no time.