I purchase the Silicon Ingot & Block 125x125 - mm. It's mono-crystalline silicon only; (100) orientation; >>0.5 Ohm-cm. Also I need data sheet, test-report to ea. deliveries. What advise me to order: sizes, qty, price, grade, etc for a solar cells, pv-cells to Pv-tech. It's known as the silicon, solar grade.