Starrett 81982 Cube 4x4x4 6FAA 6-Face Granite, Grade AA Brand: Starrett ID#: 81982-STR |MFGID: 81982 Calibration Reference $2,952.06 Quantity discounts available QuantityPrice Qty -+ Add to Cart Share Product Info Product Information Description Starrett 81982 Cube 4x4x4 6FAA 6-Face Granite, Grade AA - Laboratory. The Crystal Pink granite cube has all six faces finished flat, perpendicular and parallel. Specifications