Self-adhesive pipe markers (styles 1, 1HV, 3C, and 4) identify pipe content and flow direction at the point of need. These markers comply with ASME (ANSI) standards, have an industrial grade adhesive with a peel-to-release coated paper backing. Our self-adhesive pipe markers are made of durable vinyl suitable for indoor or outdoor environments. Snap-On™ Pipe Markers (styles A, B, C, and D) are ideal for indoor and outdoor use. May be applied to dirty, oily, greasy or rough surfaces. They are installed quickly and easily in older facilities or new construction. All stock markers meet ASME (ANSI) Standard. Pipe Markers are lightweight and durable and can be removed and reapplied in other areas Strap-On Pipe Markers (styles F, G, and H) are ideal for indoor and outdoor use. May be applied to dirty, oily, greasy or rough surfaces. They are installed quickly and easily in older facilities or new construction. All stock markers meet ASME (ANSI) Standard. Pipe Markers are lightweight and durable and can be removed and reapplied in other areas.