Cap World is the place for any truck owner to acquire accessories or modifications for their vehicles. Cap World on East Diamond Avenue in Gaithersburg sells truck caps for any size vehicle as well as commercial caps for commercial vehicles. The store also sells accessories, like bed liners (drop-in or spray-on), toolboxes, ladder racks, trailers, folding ramps for all-terrain vehicles and mud flaps. Even interior products, like floor mats, are available at this Cap World location. The Cap World store is recognizable by its bright yellow paint job with blue trim.