Direct-Fit Airtight 21mm Coin Capsule Holders For NICKELS (QTY: 250) Lot of 250 DIRECT FIT AIRTIGHT COIN CAPSULES Holds U.S. Nickel. Holds coin having 21 millimeters diameter. Manufactured (injection molded) using acrylic plastic with a non-yellowing agent, producing a two piece, snap together, friction fit cover and base. Highly durable and scratch resistant. Brand new condition. Coins not included.