Unloader One left leg knee brace (Ladywell SE4)

A model from 2010 or so; this is link to current models: https://www.ossur.com/en-gb/bracing-and-supports/knee/unloader-one
NHS issue; can't say with any certainty what type of osteoarthritis exactly it's designed to treat but seems a great shame to scrap it and hospital won't take back. However I'd prefer it to be an informed acquisition rather than a speculative one as it's an expensive piece of equipment and have also offered to a recycled medical appliances charity website. Thanks for understanding