MirorTag Charm by JL Safety- A Novel Way to Protect, Display & Put Away a Handicapped Parking Placard. This Handicap Placard Holder comes with a detachable strong Magnet Charm that will never melt or bend or break in the sun. MAGNETICALLY snap On & Off your placard to a Magnet Charm you mount behind your rearview mirror once. Full protection, and ON and OFF in a snap. Maximum Tag size is 4.125" W by 10" L. Fits all mirror posts. Made in USA Eliminates the pain & frustration to hang and remove the tag from the rearview mirror every time you park and drive. No need to look for mirror post, snap it on with your eyes closed. Fits all Mirorr posts regardless of size. Protects and preserves the condition of your parking placard permit. Tough sturdy Magnet Charm guaranteed to resist hot and cold conditions. Will NOT bend, melt or break Tag size: 4.125" W by 10" L. Easy to transfer to another vehicle if needed. Store registration inside holder