Thickness : 100 Microns , Pack of 100 Sheet Protector ,11 HOLES TO ADJUST IN ANY TYPE OF RING FILE. Stores and protects sheets, completely Transparent and clear, which is convenient for viewing. The box of 50 sheet protectors nicely accommodates small and larger projects alike. Its perfect for office, home and school use, and for business proposals and school reports to reference manuals or special-event organizers. 11 Holes - Can fit most sizes of ring binder, easy access and prevents inserts from falling out. This makes these folders the most appropriate choice for you if you want to store your documents in an organized and methodical manner. Each protector holds one sheet of paper, prevent paper from easily folding or creasing, and help you to keep a variety of important documents safely stored and professionally displayed.