... . 1. Portable grinder: Portable grinder consists of modulating speed motor, flexible shaft, polishing handle, polishing & grinding disk ... & polishing. Power supply: 220V AC, 50Hz.120W. Stepless speed control: 0-12000rpm 2. Portable electrolytic polisher: Digital display, voltage & ... Objective: 10X, 25X, 40X. Light source: 6V 15W 4. Microscope photographer: The camera can be connected to microscope and ...