Pipe Markers from Glavin are available in self-adhesive, snap-on and strap-on versions to cover a broad range of industrial needs and conditions. Brass, plastic, aluminum or stainless steel valve tags from Glavin will mark your valves and equipment to fit any spec. Two-ply and three-ply plastic, phenolic, and lamacoid are a few of the many names used to describe engraved equipment and panel tags.