Doc Fizzix 20x CD DVD Wheel Spacers for Mousetrap Cars

Allows you to use standard CDs/DVDs as wheels on only science project Flexible lightweight rubber that smooth outs a vehicle's performance Manufactured by Doc Fizzix. Fits perfectly inside any CD/DVD so you can use a smaller 3/16" axle This is a hard to find item and is a "must have" part Perfect for mousetrap cars rubber band racers and ballon vehicles