The identical outer dimensions of the square capsules allow coins of different sizes to be stored in a single collectors’ system. Square coin capsules made from high-quality, scratch-resistant plastic. Secure yet easy-to-open locking. Capsules incl. precise-fit black insert for all the most common coins with a 10 - 41 mm diameter. Capsules available in mm increments. Capsule size: 50 x 50 x 6.25 mm. For optimum storage, we recommend our collection of accessories: presentation cases, coin etuis, coin boxes and drawers. Numerous studies confirm the excellent suitability of QUADRUM foam insert for keeping coins safely. - Soft and flexible EVA Foam - Softener and acid-free (pH neutral) - Resistant Our QUADRUM coin capsules presented in this video For the discerning coin collector, the QUADRUM Square Coin Capsules represent the pinnacle of coin preservation and display.