Professional High Quality CNC Coupling(Tube union): 1)ISO9001 certificated 2)Material: ... Precision Machinery Co.,Ltd. Professional High Quality CNC Coupling(Tube union) NameProfessional CNC parts(Tube unionMaterial Copper,stainless steel,aluminum,ironCraft ... Digital Height Gange,Coordinate measuring machine,etc Business scope CNC center maching,drilling,turning,etc Production Equipment Processing ...