Gaiam balance chair with back support.
Recently bought. Selling due to moving.
Comes with a pump and box.

Pick-up in Mountain View.

https://www.amazon.com/Gaiam-Classic-Balance-Ball-Chair/dp/B0007VB4NE/ref=asc_df_B0007VB4NE/?tag=hyprod-20&linkCode=df0&hvadid=167148646512&hvpos=1o4&hvnetw=g&hvrand=7399816016785104790&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9031923&hvtargid=pla-375486093837&th=1