Red 20 Pc Billet Aluminum Fender/Bumper Washer/Bolt Engine Bay Dress Up Kit This is a set of 20 washers with 20 bolts. These will fit any 10mm bolt on your vehicle. Bolts are 6mm x 18mm, longer than many others out there. These washers will fit nearly every late model vehicle's fenders, core supports, trunk, etc including GM, Ford, Honda, BMW and many others.