Satisfy a tight budget and cut processing time. Cover-All Book Jacket Covers cut processing time because they are sized exactly to fit the most popular book jacket sizes; yet with just a fold they can also accomodate odd sized books, saving you money. Durable 1.5 mil crystal-clear polyester film protects book jackets while attracting patron's attention. Centre-Slit backing paper adds firmness to cover and protects book jackets from abrasion. To apply, simply insert book jacket into the Cover-All cover. The centre-slit paper backing makes it easy. Then, fasten to inside front and back cover with tape. Dispenser boxes of 50.