... and etc. 3.) Sizes: according to your requirments 4.) Shapes: disc,cylinder,sphere,block ,ring ,tile, arc, and ect. 5.) ... alarm stage, Loudspeaker2.) Motor Field: Voice coil motor (VCM), CD/DVD-ROM, Generator, Vibration Motor, Brushless Motor, Vehicle Motor3.) ... .4.) Packing methods: demagnetize packing box(for Air and Express) and normal packing box for sea.4. Certifications Our enterprise ...