Product Description Swanson tear Flags are made from heavy, 3 mil co-extruded polyethylene material and are perforated every 12 inches for convenient dispensing. Their bright red color makes warnings stand out clearly for increased safety. These flags are just as easy to put in place as they are to dispose of—just staple, nail, tape, or tie them to overhanging loads or wherever you need a fast, highly visible warning of a potential hazard. From the Manufacturer Swanson Easy Tear-Off Markers are convenient disposable flags made of heavy, 3 Mil co-extruded polyethylene material that is perforated for convenient dispensing. Just staple, nail, tape or tie to overhanging loads or wherever you want a fast, highly visible warning of a potential hazard. From the Manufacturer Swanson Easy Tear-Off Markers are convenient disposable flags made of heavy, 3 Mil co-extruded polyethylene material that is perforated for convenient dispensing. These flags come in several styles to meet your identification requirements - solid, stripe or “Danger” legend. Just staple, nail, tape or tie to overhanging loads or wherever you want a fast, highly visible warning of a potential hazard.