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I am reaching out with an inquiry regarding medium-sized black products that we are interested in sourcing. Could you provide me with more detailed information about the available options? Specifically, I would like to understand the material specifications, available sizes, and any variations in color or finish that you might offer in this category. Additionally, please share your pricing tiers for bulk orders, including any current promotions or discounts. It would also be helpful to know the lead times for production and delivery, as well as your payment terms. We are looking to establish a reliable partnership, so any insights you can give about your manufacturing capabilities and quality assurance processes would be appreciated. Thank you!