C-Line Clear Top-Loading Heavyweight Antimicrobial Poly Sheet Protectors, 8.5 x 11 Inches, 100 per Box (62033) Clear heavy polypropylene top loading ring binder sheet protector fits 11 x 8 1/2 inserts. Built-in antimicrobial AgION coating. No hole punching is necessary. Acid-free, archival-quality.