National marker janitorial shadow board, blue on black, general purpose composite – sb101acp many manufacturing facilities are implementing 5s shadow boards to help reduce cost and down time by keeping cleaning supplies (and other tools), in a central location, neatly stored, and always accessible. features: ideal for basic maintenance and organizational use includes shadow board and hardware for mounting tools lightweight, dual-layered aluminum with plastic core protected by sign muscle liquid laminate temperature range of -60 to 180