Product Dimension: This professional slant board measures 12.6 x 15 inches and is adjustable to four 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 stretcher slant board is durable and supports up to 450 lbs, ensuring 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 for calf stretching helps relieve symptoms of 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 transportation, the slant board is space-saving and convenient to carry.