One pair of original-equipment Fly Jumper rubber feet that fit all adult and kids models of Fly Jumper jumping stilts. These rubber feet are very easy to install onto your Fly Jumper jumping stilts. They are made out of a long lasting race car rubber compound and are held into place by four screws. To replace your old rubber feet with these new ones just requires you to unscrew four screws holding the old ones in place and then screw in the new ones. It is that easy!