Suitable for writing on both paper and slippery surfaces (coated paper, OHP flim, and etc.) Ball Size : 0.5mm, 0.4mm Features : 4Nano ink pen with Polished Metal Clip and Elegant Design 4Soft writing feeling and vivid writing colors Nano ink technology suitable for both paper and slippery surfaces. * What is Nano ink? This Special Nano ink with minute particles enables you write on the slippery surfaces such as catalogue. paper, plastic, OHP, glass and...