Unlike traditional blasting units Compact manual blasting unit M-S 355 is contemporary technology that provides for a cleaner and safer environment. This basic model is used rampantly in laboratories and dental practice laboratories. By the press of a single button, the blasting process starts and to adjust the strength, the technician can manipulate the pressure regulator. The unit comes in two varieties, one with injector extraction and microfilter technology and the other without the extraction technology.