25 Holder Pack of 2x2 Coin Snap Holder Penny (19mm) Size by Comictopia 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% Archival Plastic. No PVC! - 2- Piece Snap Together Design 25 Holder Pack