For most PCB materials, we have copper with
0.5 oz / 18 um 1.0 oz / 35um 2.0 oz / 70 um 3.0 oz / 105 um 4.0 oz / 140 um 5.0 oz / 175 um 6.0 oz / 210 um 7.0 oz / 245 um 8.0 oz / 280 um 9.0 oz / 315 um
For saving the PCB production setup fee and fabrication fee and shipping fee, 1.0 oz copper PCB is the most economic selection, and the others will cost little more.
