1、Protective case: The cover and base snap together firmly, dust-proof and resistance to oxidation, protect inside coins safely. 2、Material: These round coin cases are made of high-transparent and thickening plastic material, durable for use. 3、Size (Dia. x Depth): 30 mm Coin capsule, can hold coins whose diameter is not larger than 30 mm. 4、Transparent body: Clear coin organizers facilitate to coin storage, view and exchange, allow you easily see coins inside. 5、Convenient opening design: Each coin capsule holder has a crescent opening in the outside rim, opening more convenient and effortless. Material: plastic Size: about 18.5*12* 3.8cm Capacity: 100pcs Purpose: commemorative coin collection How to use: Separate the foam rings from the eva foam pads, then insert them into the round coin capsules and put the coins in the center of the rings, which will help to stop coins from sliding and scratching.