This is how much copper your board will have on its surface. It is the copper foil thickness, plus plated copper, minus surface preparation. It is given in oz / per sq foot. 1 oz = a minimum of 0.0012”- 0.0014” thickness. We offer finished copper of 1-oz., 1.5-oz., 2.0-oz., and 2.5-oz. If you need a different finished copper amount, please complete our PCB RFQ Form.