... PF(bakelite), PTFE(teflon) and PEI(Ultem).Our selection of Engineering Alloys include: Aluminum, Magnesium, Zinc, and Brass.Advantage:1. More ... standards, SAY, HASCO, DME, MISUMI, etc8. Continuance service and support.9. Diversified rich experienced skilled workers. Important Note:1 ... about the process. Factory image: Equipment: PRODUCT: coloration of casting transparence prototype made in China