Air-Tite coin capsule holders are made from acrylic plastic with a non-yellowing agent, a process that results in a final product that is hard, crystal clear, and smooth to the touch. The cover and base snap together firmly to form a perfect seal enclosing the ring and securing your collectable. Capsules are PVC free, archival safe, and suitable for extended periods of long term coin or bar storage. Coin capsules are made in the USA.