The new Therapy in Motion abdominal & back stretcher and massage block is ideal to help you work on strengthening your abdominal muscles while also working your obliques and lower back muscles. The trigger point massage block is comfortable on your lower back and evenly spreads the pressure. Can also be used to help with lower back (thorasic) extensions. Dimensions: 29cm x 30cm x 9cm Material: EVA foam (Ethylene Vinyl Acetate)