Craft: Welding, machining, drilling and coating
Material: Carbon steel
Use place: Filling machinery line

My company and factory are specialized supplier of machining parts in China. We have belowed machinery:
CNC machinery
Numeric & normal lathe
Linear cutting machinery
Surface & roll grinding machinery
Milling & drilling machinery

Tolerance could be controled in +-0.02mm with machining and +-0.005mm after grinding.