Set of set of 4" high letters, numbers and symbols (black letters, red numbers - white background) For use with Magic Master standard series of Springer and Swinger changeable message signs Rated for outdoor use May also be used in conjunction with Marvolus Letter Tracks (#366-WHT) This set of changeable letters and numbers is for the 24"W x 36"H white sign panels that are part of the Magic Master standard series of Springer and Swinger changeable message signs. Kit contains a 314-piece set of 4" high letters, numbers and symbols (black letters, red numbers - on white background). Components are rated for outdoor use. This set may also be used in conjunction with Marvolus Letter Tracks (#366-WHT). Please note that the maximum number of items that can be ordered at a time is 15 per customer.