Adjustable knee brace. . Supports multiple adjustable angles. . Small size for children. . Very lightly used. . Very high quality and excellent efficiency. . Used after joint and knee surgeries. . The goal is to support the knee or maintain a certain level of flexion or extension. . Very useful for children who cannot maintain a certain level of extension or flexion, especially during sleep. . Note (The last two pictures are from Google for illustration). . For sale to the highest bidder.