Gem Bids For High Quality Targets And Substrates As Per Specifications In Annexures, 46 Tungsten W Sputtering Target Aluminium Al Sputtering Target Single Crystal Sapphire Al2o3 Substrate 25 Mm Diameter Single Crystal Sapphire Al2o3 Substrate 50 Mm Diameter Single Crystal Sapphire Al2o3 Substrate 75 Mm Diameter