Double Convex round Lens, Material: Glass, designed for physics and educational uses, Because of their educational use design, there may be minor imperfections that do not affect physical function, for educational use, Size: 100mm focal length, 2in diameter and 16.5mm thick
CNC milling training system, compact, desk-top unit, exposes students to the historical development of CNC, to standard G-code and use of a computer to control the machine, Features Emergency Stop push-button, door around the spindle and material has limit switches