ABS environmentally friendly material, tasteless, durable and corrosion resistant, easy to clean and non-deformable. 4-position adjustment helps to make your muscles more sensitive during exercise, helping you to stretch properly and reduce the chance of injury. Also contributes to the recovery of X-shaped legs, O-legs, plantar fasciitis, Achilles tendon injuries, calf strains and other ankle pains. Textured surface to prevent slipping. Suitable for home, office, travel and indoor outdoor sports. Portable and easy to assemble, ready to use. Specification: Item Type: Calf Stretcher Material: ABS Color: Black, Purple, Green Size(about): 30.5x27cm Product Load: about 75kg Product Gear: 4 gear positions Package include: 1 Pc x Calf Stretcher