Product Dimension: This professional slant board measures 12.6 x 15 inches. It is adjustable to 4 positions: 15, 20, 25, and 30 degrees. (Product does not include tensioner) Solid Construction: Made of high-quality plywood with a triangular structure, this calf stretching slant board is durable and supports up to 450 lbs, providing stability during exercise. Ensure Your Safety: Features a non-slip EVA base to enhance safety and confidence during use. Suitable for beginners, experienced athletes, and all body types. Versatile Application: The ankle stretch board includes an upgraded pull ring. This slant board helps relieve symptoms related to plantar fasciitis, Achilles tendonitis, patellar tendonitis, shin splints, calf strains, ankle sprains, hip pain, tight calves, and hamstrings. Portable Design: Designed for easy storage and transport, this slant board takes up minimal space and makes a great gift for friends and family.