Since YenPen Stationery Co., Ltd. was established in 1980. It is currently one of the largest manufacturer of whiteboard, accessory items and stationery. We named it Polar-Bear.Then In 2001 established Shanghai factory. We are specialized in whiteboard & accessories (stationery) Whiteboard marker & Refill Ink. Permanent Marker. Bulletin Board, Chalkboard. Mini Memo Board (Personal Record Forms). Board Eraser (PAT No. 53972). Board Stander. Color Magnet. Board Cleaner. Nail Color, Cosmetic Pencil & Accessories. With more than 17 years of experience in manufacturing and marketing, we provide quality products to increase our customer's competiti..