This classic training aid adjusts to three heights: 7", 12", and 17" by rolling the Cavalletti to a different side. Each Cavaletti is bolted together with 4 - 3/8" bolts for strength and rigidity. 10' wide. We suggest you buy 4-6 Cavalletti for maximum use as gymnastic horse jumping training aids. The variations on how these essential training aids can be used are endless.