Each kit includes 2 anti-corrosion pages plus a book slipcase for a 1 1/2" album. Included are Littleton's revolutionary anti-corrosion pages made from Coroplast CITM, which is scientifically proven to neutralize harmful gases in the air which can cause corrosion - with no harmful agents or chemicals. The custom book slipcases reduce the flow of circulating air. Just add two powerful inserts and the custom slipcase to your existing Littleton album and give your coins the extra defense they'll need! The state-of-the-art technology will preserve your coins in their current state for up to 15 years! Affordably priced and easy to use - Littleton's Corrosion Protection™ kit offers the ultimate coin defense!