Made of PVC,fit standard 3 ring binders and folders. The material is transparent and the is frosted, which is convenient for daily browsing and identification. The zipper can be pushed and pulled smoothly without noise, without jamming, and the seam is tight. Superior tear and water resistance keeps documents, photos, tickets and more secure. 3 Holes are pre-punch, and the installation process is simple and fast,daily installation and removal is very convenient. Wide range of uses:It can be used to keep and store documents, invoices,photos, bills, cash, vouchers, business cards, credit cards, ID cards and other items, and even stationery such as rulers, small triangle boards, scissors, pencils, etc.It is also suitable for specimens of plant leaves collect. Applicable Occasions:Home,business office,school,library,laboratory,,etc. (Important Notes:It cannot fully accommodate an entire A4 size document.) Colour:transparent Material:PVC Size:about 29 x 24cm Package Contents: 12x Binder Pockets Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.