Exceed OSHA requirement that tags meet 50 pound pull strength at over 90 pounds. Graphics are fused at over 300 degrees so there are no edges to peel or curl. Guardian Extreme tags are reusable: write with permanent marker when done wipe off with Isopropryl Alcohol and the tag is ready to use again. Guardian Extreme tags have no grommet to corrode or delaminate. Master Lock™s new patent-pending process fuses graphics into durable 100% recylable polypropylene to create the longest lasting tags. Provide superior life in abrasive environments: when exposed to high humidity UV radiation harsh chemicals frequent wash downs extreme high and low temperatures and more. Tested and proven to stand up to over 30 harsh chemicals found in many facilities. The same tag can be used inside or out eliminating the need to purchase and inventory a different tag or sign for outdoor use