We call them "plate vaults.". The plate is made of aluminum.
Nascar Number 14 Car Booster License Plate Checkered Flag Racing Motorsport Race
Nascar Number 20 Car Booster License Plate Checkered Flag Racing Motorsport Race
1990's NASCAR #99 JEFF BURTON BOOSTER License Plate
Nascar Maxwell House Coffee Booster License Plate Number 22 Car Sterling Martin
NOS NASCAR # 18 BOBBY LABONTE Chrome License Plate 910439 New Sealed in Plastic
NOS NASCAR # 15 MICHAEL WALTRIP Chrome License Plate 910438 New Sealed Plastic
