The capsule tubes are designed to store Air-Tite Brand Capsules. Each tube has a small hole poked in the cap to allow air-flow when removing the lid, tubes will hold 20 completely closed capsules. The tubes do not provide any extra protection for the coins, and are only a storage solution. These capsules are Made in the USA from an acrylic plastic with a non-yellowing agent. This process results in a final product that is hard, crystal clear, and smooth to the touch. The cover and base close together firmly to form a perfect seal. The capsules are PVC Free, archival Safe are suitable for extended periods of long term coin or bar storage.