1. 17 to 30 mm size: The coin collection box has 5 different specifications, namely 17 mm, 20 mm, 25 mm, 27 mm and 30 mm, suitable for storing most types of coins. 2. EVA foam pad: The storage box can easily separate the foam ring from the EVA foam pad according to the size of the coin to prevent the coins from slipping and scratching. 3. Perfect seal: The transparent coin storage is convenient for the storage and replacement of coins, and the lid and base are tightly buckled, dust-proof and anti-oxidation, and safely protect the contents. 4. Adequate quantity: The coin protection cover includes 100 coin capsule covers, 1 plastic storage box and 100 matching EVA foam sealing rings to protect your favorite coins. 5. Easy to open: There is a crescent-shaped opening on the outer edge of each coin capsule holder, which is more convenient and labor-saving to open.