印度采购需求：7440-69-9，中国高品质铋金属锭1公斤价格出售，中国纯铋，铋，有色金属

I'm looking to source high-quality bismuth ingots with a purity of 99.99%. It's important for my project requirements that the ingots meet strict standards for both quality and consistency. Please provide details regarding availability, pricing, and any minimum order quantities. Additionally, I'd appreciate information on your production lead times and shipping options. If you have any certifications or specifications that guarantee the quality of your bismuth ingots, please include that as well. Looking forward to your prompt response!