Identify junction boxes, switches , circuit breakers, raceways, pipe, conduit and fuse boxes; Non-conductive for user-safety; High-adhesion properties with easy removability. Vinyl-impregnated clotch construction provides long-lasting durability; Resists abrasion, moisture, dirt and oil. Non-smear, black legend on bright orange background for high visibility. Temperature range from -40F to 180F, (-40C to 82C); Adhesion is 45 oz./in. width ultimate. Medium legend has four markers per card 1.125 by 4.5 inches with 3/4 inch type.