Box of 25 holders are intended for premium long- term Archival storage or display of your coins. Made of inert high impact, crystal clear polystyrene a 100 percent Archival plastic the holder will not harm coins. - 2x2 coin snap holder for premium display or long- term storage of coins - made of inert polystyrene will not harm coins - insert with black foam on one side and white paper on the other - 100 percent Archival plastic.