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 safely and efficiently store and protect your loaded semi-rigids. Sports fans love these boxes for storing baseball, basketball, football, and hockey cards. Gamers use them to store Magic: the Gathering, Dragon Ball, Pokemon and YuGiOh cards. • Holds about 350 loaded Semi-rigid card holder #1 • Stores cards standing up, vertically