bcw 660 card storage box - 5 ct bcw 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 for store and protect collectible trading cards like: baseball cards, basketball cards, football cards, magic the gathering, vs, yu-gi-oh, pokemon, dragonball z and others.