These soft metal labels are easy to write on with a ball point pen or pencil. They stay legible in all kinds of weather. The 8 inch wires included in the packaging will also last as long as the labels. For over 40 years, these tags have been produced in USA by people who wanted to make the best outdoor tags on the market. You will not find anything better or longer lasting that Amekron Impress-O-Tags. Non-magnetic. These are aluminum wrapped around a cardstock center. For even bigger jobs, check out our Jumbo Size tags.