Like half a dozen other people have reported back (I wish I had read the reviews) I got this ball only to find there was no adapter for pumping it up.
I wasn't expecting a pump. I have a foot pump and bicycle pumps in the house. They included TWO stoppers (to stop it deflating), but no adapter to get it inflated in the first place. There isn't even a valve, so you cannot blow it up with your own puff, an adapter (of a specific fit) is required.
Amazon were useless as always when you phone them. Offered to send another whole exercise ball out, but could not be sure it wouldn't have the same problem. As someone else has previously reported they did this but got no adapter with the second ball, I cut my losses and hung up on the call centre. They have taken too many hours of my life which I won't be paid for, so I chalk this one up to Amazon incompetence and will kiss my £10 goodbye.
This is the trouble with Amazon. If everything goes ok then you get a reasonable deal, if anything goes wrong the follow-up is infuriating.