Proworks exercise ball 55cm (Winnersh RG41)

This is a Proworks exercise ball, the biggest they do (55cm - 80xm), plus inflator. It's use was as an office chair whilst I tried to rehabilitate after damage to my brainstem. I've since found that, however plastic some neurons are supposed to be, brainstem neurons just don't regenerate, so the ball has fallen out of use.