The Yellow Numbers Dry Transfer Decal is the fastest and easiest way to customize a derby racer. Colorful stripes, flames, numbers, and graphics apply easily in seconds. They are high-quality rub-on decals that can be applied around contours and over textures by rubbing them on with a Dry Transfer Burnisher or a dull pencil. With Dry Transfer Decals there is no clear film around the edges of decals.