Air-Tite Coin Capsule Direct Fit "A21" Coin Holder for NICKELS Air-Tite holders are made from an acrylic plastic with a non-yellowing agent to ensure the crystal clear display of your coins for any length of time. All materials used in the production of the coin capsule coin holders are totally inert and PVC free. The Direct Fit Coin Capsule Coin Holders are designed to securely hold and display your mint condition coins without a ring.