Avery 89101 Binder Spine Inserts, 1/2" Spine Width, 16 Inserts per Sheet (Pack of 5 Sheets), White Label binder spines for an organized and professional look Perforated cardstock allows for easy separation Works best with Avery Easy Insert Spine Binders Can be used in all laser and inkjet printers Customize spine inserts with free software and templates at avery website