俄罗斯采购需求：营养技术、生物技术、RiviK2、维生素 K2 MK-7、营养矿物质、γ-氨基丁酸

I'm looking to source Zinc Oxide, Sulfate, and Manganese Oxide in bulk quantities of 20 metric tons. I'd like to understand the available grades and specifications for these products, as well as the potential for customization to meet specific quality standards. Additionally, could you provide information on your pricing, lead times for delivery, and minimum order requirements? It's important for us to ensure the materials align with our production needs and timelines. Hope to hear from you soon with the relevant details.