The Dansco Archival Quality Slipcase has been produced with Silver-Guard corrosion-inhibiting protection. The military specification material permanently neutralizes corrosive gases in the air that can cause toning and discolorating. This works with silver, gold, copper and nickel coins and medals, medallions, bars, and ferrous metals. This will not remove existing toning. Use this slipcase (Dansco model 6438) with 3/4 inch albums (containing four to five pages).