Dansco Archival Quality Slipcase are available in six sizes to fit all genuine Dansco Coin Albums. Dansco archival quality slipcases are made with Silver-Guard corrosion-inhibiting protection. Silver-Guard offers a dense 2-mil coating for years of corrosion protection that no other product can match. The slipcases inhibit toning and will not change existing toning. A special Military material permanently neutralizes corrosive gases in the air that can cause toning and discoloring. Slipcases work with silver, gold, copper, nickel, and iron coins, as well as with medallions and bars.