Bankers box® Stor/file storage file STOR/FILE™ Storage File, String/Button Tie, 15 x 10 x 24, Letter, White, 2/Pk Extra Strength—For moderate use and higher stacking needs Medium-duty box offers 25% greater stacking strength than other brands. Ideal storage for inactive files, works with or without shelving. Easy one step FastFold™ set up. Maximum security box. A minimum of 59% post-consumer content. Inside dimensions listed below (w x h x d).