Description: Compact Size: Portable Back Massager Tool is easy to carry and store, does not take up too much space Lightweight Sturdy: Massage Roller is made of high strength pp, which is sturdy, not easy to break, and can be used for a long time Adjustable Design: Easily customize your stretch by rotating the large central massage head. This simple mechanism adjusts the arch height (from 65mm to 80mm), allowing you to start gently and gradually increase the intensity as your flexibility improves, making it ideal for all user levels Stable & Secure Base: Designed with non-slip base, this back stretcher stays firmly in place during use. You can use it with confidence on any surface, from your office chair and sofa to a yoga mat or carpet, without worrying about it sliding Wide Use: Back massage tool is easy to take with you to the office, gym, or on your travels, ensuring you have access to back relief whenever you need it Specification: Material: ABS Size Chart: 19.5cmx13.5cm/7.68inchx5.31inch Adjustable Height: 65cm-80cm/25.59inch-31.50inch Package Includes: 1 Back Massager Tool Note: Please allow slightly errors due to manual measurement and different monitors.