For the best protection for your coins Valley Coin recommends the AIR-TITE coin
holders. They are made from clear acrylic plastic with a non-yellowing agent.
The insert that fits around the coin (available in BLACK or WHITE) is
manufactured from a polyethylene material that contains no PVC or other
materials which are harmful to coins and medallions. The holders are completely
inert. Because of the wide range of sizes available they are a great way to
package and preserve all of your valuable coins.