1) Product Size: 11.02 L*11.02 W*1.62 H inch. Max bearing weight:300KG(661 lbs) . 2) Product usage : Twist your way for Slimming and Strengthening, Stimulating blood circulation; Massages the feet. Using our Twist Board for exercise is a quick and easy way to burn calories from your thighs, hips , waist and core. The waist-twisting exercise can also train the abdominal muscles inside the abs and the hips . It is one of the best choices for your bodybuilding, weight-loss excercises 3D concave-convex particles massage the soles of the feet, accurately align the acupoints on the soles of the feet, twist the waist while increasing the activity of internal organs, massage and health care in one. Magnetic therapy massage, 6 magnets attached to the core twist provide magnetic therapy to activate your athletic cells, magnetic balls rub against each other during exercise to produce micro-currents, stimulates Blood Circulation -- Combines the principles of reflexology, exercise and magnetic therapy to produce an overall effective exercise system. 3) Product features: With more Precision ball bearings , users can rotate smoothly & more quickly on the platform. Electronic counter, LCD screen, real-time recording of waist twisting data . Sturdy ABS material, with a measured load-bearing capacity up to 300KG . Non slip surface, you will not slip when you twist your waist. The twist board is lightweight and convenient to carry, it's good for indoor & outdoor use , easy to use, easy to practice