Grainger offers a wide selection of letter and number sets for facility identification and signage. Sets are available in various materials like plastic, aluminum, and photopolymer, and come in different sizes ranging from 1-inch to 8-inches tall. Letters and numbers can be ordered individually or in pre-assembled sets. Adhesive, screw, and magnet mounting options are available. All products meet OSHA standards for workplace safety signage. Grainger's large inventory and fast shipping makes them a go-to supplier for facility identification needs.