Cups mount on two feet and stop machines from moving on hard floors. Also used to level machines if floor is not even by simply adding included washers until the machine no longer rocks. Guaranteed not to fall apart or break and will last as long as you have a Curves club and then some. Only use one pair per machine usually on the front feet. Watch video for installation on carpet but it is the same for hard floors.

If you need anti-slide cup for carpet

 

See Anti-Slide Cups for Carpet Floors Here