Clear plastic, round coin holder storage tubes with unbreakable plastic screw on tops. Features an air tight lock for permanent security. The round tubes are made of crystal clear polystyrene which is an inert plastic, safe when in contact with coins. These tubes are specifically designed for storing loose coins, but can also be used to hold other small items such as buttons, sewing supplies, hardware, fishing tackle, jewelry making supplies, beads, small cosmetic items, matches, and more. These round Nickel size coin storage tubes are perfect for long term storage of your coins.