Sturdy Material - This product is made of high-quality materials, well-constructed, sturdy, anti- design, which will protect your heels and calf muscles from injury. Non- design - has a textured surface and a plastic/rubber lip on the heel that keeps my foot from slipping off the board. Adjustable Tilt Board - This adjustable balance board helps keep your muscles and calves stretched to prevent plantar fasciitis flare-ups. Helps you stretch correctly and reduces the chance of injury. Easy to Use and Carry- You can stand on it or sit on a chair, choose the right position, relax your muscles and keep your body healthy. These ramps are suitable for flexible use , office, travel and indoor and outdoor sports, it is foldable and very convenient to carry. size: 31 x 28CM Material: ABS environmental protection colour: black Package Contents: 1 x Stretch inclined plate Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.