These spiral-binding, plastic-coil, and pre-punched document-binding covers have 43 round holes which work perfectly with standard 4:1 pitch spiral coil binders. These clear, glossy, and plastic cover stock sheets are letter size 8 ½" x 11" with square corners, and they are a heavy weight 10 mil thick. They remain flexible, but they possess a sturdier weight that can elevate your presentation. Using punched report covers like these means all you need is some pre-punched filler paper and a crimping tool to finish the ends of your book. There is no more time or hassle spent punching your pages, so you can quickly produce coil-bound books as needed. These clear binding covers (sometimes called clear acetate covers) have crystal-clear clarity, giving you an enhanced view of the first page of your presentation. The glossy finish actually helps enhance clarity and colors for a vibrant look. This means you can customize each report with the clear view by simply personalizing your printed first page. These clear binding covers are made of an acid-free clear gloss and plastic material that resists moisture and can easily be wiped clean.