Product Dimension: This professional slant board measures 12.6 x 15 . It can be adjustable to 4 positions: 15, 20, 25, 30. (Product does not include tensioner) Solid Construction: Made of high quality plywood, shaped like a triangle structure, our calf stretcher slant board is durable, can support up to 450 lbs, ensuring stability when exercise. Ensure Your Safety: Adopting nonslip EVA base, our slant board ensure your safety and confidence during your workout. Suitable for beginner, veteran athletes and all type body. Versatile Application: Ankle Stretch Board has an upgraded pull ring, slant board for calf stretching can help you relieve symptoms of plantar fasciitis, Achilles tendonitis, patellar tendonitis, shin splints, calf strains, ankle sprains, hip pain, Tight Calves & Hamstrings. Portable Design: Adopting portable design for easy storage and transportation, the slant board doesnt take much space. It can be an ideal gift for your friends and family.