The Kointain Coin Holders for Nickels are considered one of the smartest ways to protect and preserve any coin in your collection, particularly those of extraordinary value. Made of super-thin, flexible, nearly invisible Mylar, they are proven safe for long-term coin storage. The unique convex design allows only the edges to come in contact with your coin. These Kointains fit 21.2mm coins.
These Kointain Coin Holders for Nickels provide museum-quality protection for your coins, and are endorsed by the National Numismatic Collection at the Smithsonian Institution. Kointains can be stored in cardboard 2x2s or coin flips for additional security.