The BCW Storage Box is the highest quality, most competitively priced cardboard storage box on the market today. They are constructed of white corrugated paper and have a 200 lb. test strength. Use this box to store and protect collectible trading cards like: baseball cards, basketball cards, football cards, Magic The Gathering, Yu- Gi- Oh, Pokemon, and others. Use Slip Guard Strips to keep your cards securely in place.