niceEshop(TM) Magnets Twist Board, Anti Slip Surface Pivot Base, Suitable for Fitness Workout Rehabilitation Training Exercise Balance Disc Board(Blue) Material:PP; Size:24.9x2.8cm/9.8x1.1inch Twist body to slimmer abs, hips, and thighs Rotating Disc provides a high-impact aerobic exercise massage and stimulate meridian points on the bottom of your feet for health promotion Lightweight and compact, Perfect for home, gym or travel