Marvy LePen 4300-S33 Oriental Blue 0.3mm Micro-Fine Plastic Point Pen by Uchida. UPC 028617432908. The Marvy LePen delivers smooth writing with micro-fine plastic point and a sleek barrel design. Ink is acid-free, smudge proof and nontoxic. They are good for business forms, notebooks, diaries, memo pads, letters, journals, yearbooks, and scrapbooks. LePen conforms to ASTM D4236.