Precoiled and strap-on pipe markers for 3/4-1 pipe diameters compressed air – white on blue strap-on pipe markers are great for use on wet, oily, cold and dusty pipes where pressure sensitive vinyl markers won’t hold. Safety markers fit on pipe diameters from 3/4 to 1. These color coded safety markers prevent injury by providing warnings for specific hazards. Pre-coiled pipe markers can be easily removed and reapplied to other areas. Pipe markers allow 360 visibility for both indoor and outdoor environments. Markers are 8w with 1/2h letters. Safety pipe markers help conform to ansi a13.1996 standards for pipe identification.