1This is a PP transparent binding film, made of high quality PP material. 2You can use this to make a loose leaf cover, protect the inner papers. 3Waterproof shell, PP environmental protection material, safe and reliable. 4The cover does not have holes, so you can use the hole puncher (not included) to make it according to your need. 5Colorful design, 50 pcs in one pack, enough for yo to use.