These 30mm Air-Tite Direct Fit Coin Holders will fit U.S. Half Dollar coins. Protect your Half Dollar Coins with this clear plastic case that provides a direct fit for your coin. These Coin Holders provides total protection for your coin, keeps it air tight, moisture free and tarnish free. It allows obverse/reverse viewing. These great plastic holders contain no PVC's, it will not yellow or become brittle and is highly scratch-resistant. The holder consists of two lucite plastic cases (top and bottom).