These Wobble Disks are the preferred piece of fitness equipment for physiotherapy rehabilitation and chiropractic centres all across Canada. Choose your wobble disk based on client needs; a 13.5 and a 22" oversized wobble disk are now available. Fill each piece of fitness equipment with air for desired level of difficulty. These wobble disks have countless training and rehabilitation uses for core and balance fitness training. Wobble disks are the perfect solution for rehabilitation of injuries chiropractic needs injury prevention balance training and improving core strength. Fitness Equipment Features:Inflatable textured diskHeavy-duty PVC constructionRegular Size: 13.5" W x 3" HOversized: 22" W x 3.5" HAdjust inflation for varying difficulty levelsIdeal for increasing stability balance training exercises core strength and much more!"