Image Item No. Description  52036  Vehicle, Base 4 x 12 x 3/4 with 4 x 2 Recessed Center with Smooth Underside Catalog: Parts: Vehicle, Base  11650c02  Vehicle, Base 5 x 10 x 2 1/2 with Mudguards and 6 x 2 Recessed Center with 3 Holes with Light Bluish Gray Wheels Holders Attached Catalog: Parts: Vehicle, Base  3385  Vehicle, Base 6 x 12 x 1 with 5 x 6 Recessed Center, 12 Holes and 1 x 2 Cutouts on Ends Catalog: Parts: Vehicle, Base  64954  Vehicle, Trailer Base 6 x 16 x 2 2/3 with 8 Holes Catalog: Parts: Vehicle, Base