Choose your letter size bundle. All orders come with sufficient tracking for applying to both sides of a standard A1 size A frame or sandwich board. Red letters can be purchased as an extra. Important Information. Though the tracks come with a self adhesive strip outdoor signage will require additional gluing or riveting. We are unable to give any cast iron guarantee to the effectiveness of our self adhesive tracks, due to vast amount of differing surfaces and conditions, such as stream, condensation and heat. A spare piece of tracking is always supplied. Use this piece to gauge the effectiveness of the adhesive strip on your chosen surface.