Bosu Elite 350012 Balance Trainer An elite version with a higher density dome, reinforced base and special, designated training zones that allow you to achieve optimal body mechanics during advanced training. Properties: It is supported by the new WeckMethod™ training system. Diameter: 65 cm Tips on how to inflate the BOSU Place the pump tip firmly into the hole at the bottom and inflate the BOSU to a height of approximately 23 cm. Warranty period: 24 months Color: gray