Archival quality protection made for Proof Sets, Mint Sets, Modern Commemoratives, Silver Eagles, BU rolls and pretty much any other coin set. Both the lid and the box itself are lined with Corrosion Intercept. The box securely holds 16 of the double Proof Sets like those issued from 1999 to date and even more of State Quarter proof sets and earlier single piece Proof Sets. Dimensions of the box are 13" inches long, 6-7/8" wide and 3-1/4" tall. Intercept Shield acts as a neutralizing agent cleansing the air around the coin protecting it from the harmful effects of corrosion. Buy by the case of 12 and save even more.