The Grainger website offers a variety of letter and number sets for facility identification and signage. These sets are available in several materials including plastic, aluminum, and photopolymer. Letter heights range from 1" to 12" and numbers range from 1" to 18". Sets are available in a variety of colors and can be ordered as complete alphabets, complete number sets, or custom mixes of letters and numbers. These identification products are durable and weather resistant. They can be used for interior and exterior signage applications.