Air-Tite "A" Black Ring Coin Holder for 15mm Coins Air-Tite Holder with Black Ring for Half Dimes 1806 to 1873, Type 1 & 2 Gold Dollars, or $1 Gold Commemoratives (15mm) The outside diameter of the "A" holder is 1.218" (30.93mm) Each order is for a single holder with ring Air-Tite holders are made from an acrylic plastic with a non-yellowing agent to ensure the crystal clear display your coins for any length of time. The rings are made of an inert cross-linked polyethylene which secures the coin in the holder and blocks air contamination. The black or white ring around the coin gives the appearance of matting, similar to the framing on photographs and artwork. All materials used in the production of the holders and rings are totally inert and PVC free.