Variable depth Bookfolds, also called bookwraps, are primarily used when shipping books, catalogs, magazines and even three-ring binders. All four side panels of a Bookfold have score (fold) lines at various depths to accommodate the thickness of the item being shipped. Simply bend the appropriate score (fold) lines for the desired depth. Argrov Bookfolds have a white exterior and are constructed of 175# test B-flute corrugate. Select from 13 sizes. Bundle count: 50.