SAFE Direct Fit Air Tite Holders are made in Germany in over 50 sizes from 14mm through 50mm.  Not the cheap plastic coin holders you often find on other coin supply websites.  Extra durable, scratch resistant crystal clear, acrylic glass capsules are made of a virgin polystyrene that  are  free of oils and contaminants for  long term  storage.  Each capsule consists of two pieces that securely snap together providing superior long-term protection for your entire collection.  The capsules lock securely in the sealed chamber, yet are designed to open easily if necessary.  The rims/sides of the capsules are also crystal clear so that you can see the edge of the coin.