Aluminum Write-On Tags with Copper Wires for Attaching (Pack of 100) Pack of 50 or 100 Aluminum Write-On Tags with an eyelet and wires Tag can be engraved with a ball-point pen or a sharp object for labeling on the spot. Uses include labeling plants, trees, shrubs, assets, inventory, gifts and more. Tags are 3/4" x 3-3/4 and copper wires are 9" inches long. Tags are made from a thin, flexible, .005" thick aluminum to make them easy to write on.