The original SGX Surface Generator provides progressive labs around the world with proven, high-performance cutting technology for CR39, hi-index, and polycarbonate lenses. Compact and intelligent, the SGX Plus processes all lenses totally free of elliptical error. Its computer-controlled precision provides a low-stress means of generating exact prescription curves. It is run by a brush motor and uses a milling ball cutter for ultimate power and precision. It is available in 115 volt and 230 volt and comes in a variety of flutes (3, 9, 12).