... designs and colors are welcomed.3. Customized designs and requirements are welcome4. File folder use for office, school, ... . Cover: Art paper +4C print +glossy/matt lamination.3. Cardstock thickness: 2.0mm,, 2.5mm, 3mm.4. ... ",1.5",2",2.5",3", 3.5"6. Ring Spec: 2 rings, 3 rings, 4 rings, O-ring ... Co., Ltd, with the experience of ring binder and folder production for more than one decade, primarily serve ...