1. A mixer of magnetic powder and nylon 6. 2. It can be put into machine to inject plastic parts directly. 3.Passed RoHS & UL. MaterialMagnetic Powder and nylon 6ColorBrownCertificateRoHS,ULUsagePCM for color TV,Monitor,Magnetic Developing Roller for Copiers,Printers,Rotors and Magnetic Component Isotropic Bonded Injection Ferrite Granules