... friction 2.Long life of a wide temperature range 3.Lower operating temperature 4.OEM, ODM service 5.MOQ:100pcs ... linear bearing LM 3L 3*7*19(d*D*L)linear bearing LM 4L 4 ... , digital three-dimensional coordinate measuring device (precision equipment), multi-axis machine tools, press machine, tool grinder, automatic gas cutting ... . Photo of our factory: linear bearing LM 3L 3*7*19