... with elastic tube , pilates half balance ball , balance half ball , half exercise ball, half gym ball , half exercise ball , half bosu ball dia:58cm- ... customizable logo: can be printedBosu ball, Bosu Balance Trainer, balance half-ball, with elastic tubeDia: 58-60cmWeight: 6kgcolor: blue & black ... referred to as the "blue half-ball", because it looks like a stability ball cut in half. The name is an ...