" Good Coworker Co., Ltd." is one of Taiwans & Chinas professional suppliers of stationery and offers a huge range of high quality products from leading brand. We can handle the planning and design comprehensively which are based on customers requirements. Our R&D team is specialized in product design, mechanical design. With our professional technical support, sincere and positive R&D spirit, and years of experience, we successfully assist our customers to promote their commodities in such strict quality requirement markets as Japan, Europe, and USA卐tc. Ex. The product for Chalk and Wax-Oil Stick are toxic-free. The Chalk has passed EN71(1,2,3), ASTM-D4236 quality Certification. The Wax-Oil Stick stands up to the rigorous inspection by CE (EN71), ASTM-936 and MOEA (CNS4798-10).