(20) BCW Brand Round Clear Plastic (Half Dollars) Size Coin Storage Tube Holders with Screw on Lid 20 BCW Round Coin Tubes for Half Dollar Coins Clear Round Plastic Coin Tubes for U.S. Half Dollar Coins Designed for Coins 30.61mm in Diameter - Tube Depth: 42.9mm The Round Tubes are Crystal Clear Polystyrene - an inert plastic, safe when in contact with coins Unbreakable Plastic Screw on Cap