Intercept Shield coin albums are museum quality and a handsome, safe way to store and protect your coins. This album has spaces for National Park Quarters from 1916 to 2021 including proofs. The album contains six pages with spaces for the two business strikes and two proof coins released for each state. The album is constructed from high-grade, acid-free and sulfur-free materials and lined with Intercept Shield, a breakthrough technology protecting your valuable coins from environmental damage. The album also comes with a slip case giving your coins double protection. Intercept Shield acts as a neutralizing agent cleansing the air around the coin protecting it from the harmful effects of corrosion.