This is a small roll of RCRENEW RC wheel bearing shim tape for loose wheels. Sometimes wheel bearings are slightly different sizes depending on the brand and can be loose in your wheels and loose bearings can make your car wander. This Ceramic wheel shim tape wraps around the bearing to eliminate slop so your bearing is tight again. Also helps when the wheels themselves are worn.
 
Simpley wrap this around your bearing tightly just one one revolution, then evenly push in the bearing into the wheel. You can cut off any excess with an exacto blade as some exess will always be visable.
Comes in a mni convenient case with cap. use as needed or when bearing starts to get loose again.