Product Description The Hillman Sign Center offers the convenience of packaged letters and numbers kits. Choose from several sizes in multiple color combinations; gold on a black mylar background, black on a white vinyl background or black on a silver reflective mylar background. From the Manufacturer The Hillman Sign Center offers the convenience of packaged letters and numbers kits. Choose from several sizes in multiple color combinations; gold on a black mylar background, black on a white vinyl background or black on a silver reflective mylar background.