bcw 800-count storage box for standard 20pt trading cards, 200 lb. test strength (10-count ) 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 to store and protect collectible trading cards like: baseball cards, basketball cards, football cards, magic the gathering, yu-gi-oh, pokemon, and others.