Cap-Tubes are the "Ultimate" Air-Tite Coin Capsule Holder storage system. Each Cap-Tube has the capacity to store up to 20 Air-Tite brand coin capsules. Air-Tite brand coin holders are Made in the USA from 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 snap together firmly to form a perfect seal. They are PVC Free, Archival Safe and are suitable for extended periods of long term coin or bar storage.