No more dealing with tape and leaving messy residue. Protect and secure your hazmat placards with our clear and durable placard shields. These shields help keep your placards in place and from folding or blowing out while driving in rain, wind, and rough road conditions. Just insert the clear shield over your hazmat placard in your trailers placard holder and snap into place. Contains a thin removable plastic on both sides of the shield to prevent any scratches from shipment. NOTICE: PLEASE REMEMBER TO PEEL OFF & REMOVE the plastic protective film from both sides to reveal the clear placard. Sold as a set of 4.