Curious about how precision medical components are actually made? In this video, we take you inside Dongguan Yue Lin Sen Metal Technology's ISO 13485-certified facility to show the full production journey of a 4.2 lumbar puncture needle model. You'll see CNC engraving lathes, lathe-milling compound machines, and a 100,000-grade dust-free workshop in action, plus laser cutting of stainless steel capillary tubes and secondary processes like tapering, capping, and bending. A practical walkthrough of non-standard metal part manufacturing for medical device professionals.