describe:1. Professional level five - level one is for beginners, level two is for seniors, level three is for people with basic exercises, level four is for yoga, sports and fitness people, and level five is for fitness experts.2. Relieve foot and heel pain - Relieve joint strains, joint sprains, arch pain and plantar fasciitis, Achilles tendonitis and other foot pain. Helps restore flat feet, arches, valgus, inverted X-shaped legs, and O-shaped legs.3. All-round anti-slip - anti-slip design, the bottom of the board is made of anti-slip rubber, ensuring that the stretcher will not slide when used on any surface. The layout is also anti-slip, so you can exercise with confidence.4. Reliable - Made of thickened ABS and thickened solid steel, with strong weighing capacity. The widened layout design is very comfortable. It is a very popular alternative to heavy wooden boards.5. [Comprehensive Application] Can help you stretch places that your hands can't reach, the inclined plate design is versatile and suitable for hamstrings, calf muscles, soleus, shins, and Achilles tendons.Specification:Material: ABS+TPRSize: about 32*30*34cm (12.59*11.81*13.38in)Weight: about 1200gMaximum load: about 600kgpacking list:1*calf stretcher