Material: Coin flip cardboard made of paper, covered with high transparency film, PVC-free, Coin collection supplies will not harm the coin.
Advantage: Transparent plastic film are made by mylar, dust-proof, oil-proof, water-proof. slightly wrinkled to keep the thickness of the coin without tearing.
How to use: Just fold with coin inside, then seal with staples or tape. You can also mark the size, age and texture of coins on the coin cardboard holder, which is more conducive to your appreciation and collection of coins.
Size: the cardboard comes with 6 different size, including 20.5mm, 23 mm, 25 mm, 27.5mm, 31.5 mm and 40 mm