The National Optronics 3B is designed for reliability, low maintenance, higher productivity, speed and accuracy. You are able to view the job screen and the lens layout at the same time with the split screen feature. The blocker stores up to 200 jobs. You can use one of the 3 serial ports to receive data from the host or tracer or send data to your edger. The National Optronics 3B blocker has an easy to change bulb, and footswitch for improved ergonomics.
