... by customers needed Material is brass 1/4 NPT machining hole high quality with professional technical control 1.46 ... steel,copper ,brass.6. Equipment: 25-400ton punching machine, CNC machining, milling, turning, lathe cutting, planning machine, heat treatment machine, ... or samples.Rizhao Yuxin Motivity Co.,Ltd is a leading manufacturer and good supplier in China of machining parts and stamping parts. ...