Write-On Hazardous Communication Labels - Magid Glove The National Marker HM29 Write-On Color Bar Right-To-Know Labels comply with 29 CFR-1910.1200 and are pressure sensitive. They can be written on to customize information. health, flammability, reactivity and personal protection labels. 250 labels per roll. Height (In.): "HEALTH / FLAMMABILITY / INSTABILITY / PERSONAL.." Width (In.):