Used this Theraband ball at the physical therapists or at least one very similar, there's might have been the Pro version. Bought it to continue with exercises at home since cost was reasonable. It did not come with a pump so had to buy something to inflate it with since I was afraid to use a larger compressor. Although they give you a tool to extract the plug when you need to add air it , for me at least, was impossible to get the tool under the plug. Had to use a knife to get under it enough to use the tool.