1.be used in ballpoint pen producing. 2. The world top 500 company's product 3. stable qualtiy 4. quick delivery ... for Zinc, Bronze, Aluminum and steel. As one of the top 5 engineering plastics(PA, PC, POM, PET or PBT, PPO ... for Zinc, Bronze, Aluminum and steel. As one of the top 5 engineering plastics(PA, PC, POM, PET or PBT, PPO ...