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Mono Crystalline silicon Silicon Ingot Purity ;6 N min solar grade mono crystalline donor ; Doppant ;P/Boron density smaller than or equal to 100sq cm resistance 3.0-6.0 ohmcm Diameter for156 mm sq wafers ;198=1mm [round]length ; 150mm-400mm i yr contract .we are ready to visit manufacturing plant or distrubtors for inspection and availablity of product on long term basis silicon ingots, solar grade, mono crystalline mono crystalline silicon ingots , steel rails, scrap vessels