... file folder 2.Ring Shape:O-Rings ,D-Rings 3.Thickness: 1-3.5mm 4.Cheapest printing plans Brief introduction:1.100% printing ... box, calendar, folder, envelope, paper card, poster etc. 3. Free stock samples.4. High quantity, quick delivery time, secure shipping, responsible after ... , 100g and so on10. Mechanism including: 2-O/D,3-O/D,4-O/D,23-O binder11. Customer’s design and ...