Guardhouse coin holders are engineered to precisely fit United States coinage. Your coins will not get stuck in these holders. Nor will they rattle around. From the Penny to the American Silver Eagle, Guardhouse coin capsules are the industry leader in both quality and price. These capsules are made with archival, scratch resistant acrylic (PMMA). The 19mm capsules have a small exterior size fitting the following U.S. cent coin types: Fly Eagle, Indian Head, and Lincoln.