For sale is a Strasbaugh model 7AA Grinder Wafers ranging from 75 to 150 mm Features: - Concentrically mounted grinding wheels on a single air bearing spindle for easy alignment and dual-grind capability - Single-chuck design for stack removal and fine finishing - Three-arm, two position pick and place robot for reliable wafer movement - Dual input and output cassettes for high volume SN 0051084 208V; 30 A; 60 Hz; 1PH