... O-Ring Binder/ D-Ring Binder Customized for International Client.1. Eco-friendly, weather and tear resistant ,durable2. ... , great service and solid reputation. Detailed Product Description 1. Paper Ring Binder2. Cover: Art paper +4C ... 3mm.4. Size: A4,FC.5. Spine size: 1",1.5",2",2.5",3", 3.5"6. ... in China, and more than 90% of international large pharmaceutical companies who develop business in China, ...