MS104R43CNC+MS666EXT is a replacement for Heidenhain that original equipped with 12 inch Monochrome CRT Monitor (All compatible Manufactures and models are listed below). It also comes with a wire adapter, so you can plug into your existing signal connector to MS104R43CNC+MS666EXT. MS104R43CNC+MS666EXT had upgraded to our UB54 sunlight readable LED kit. It will last 10 times longer than CCFL backlight. Easy to install, anyone can do it!