Stronger, tougher, and more versatile trainers feature one-piece, dual-layer European construction so strong that it supports any user size and handles dynamic aerobics workouts! Now you can train for strength, balance, or both while knowing the KingDome™ will safely support virtually any amount of weight. Outer layer is textured and tacky for superior traction without shifting on the floor. Vary the difficulty by flipping the 9"H x 18" dia trainer over for pushups and advanced balance training. Easily inflates with needle pump (not included). Available individually in red, in a Rainbow® sets of 6, or in ClassPlus™ packs of 12 and 24 of red or Rainbow® colors with convenient storage.