德国采购需求：硼砂肥料、硼砂滴眼液、硼砂高硼硅酸盐玻璃用料、硼砂家用衣物清洁剂、硼酸、硼酸pH缓冲剂

I'm looking to procure boric acid for my upcoming project. Can you provide detailed information about your available grades, including purity levels and any certifications? Additionally, I'm interested in understanding your pricing structure and any bulk purchase options you may offer. If possible, could you also share lead times for delivery and your terms of payment? It would be great if you could send over a product specification sheet and any relevant technical data sheets to help us make an informed decision. Looking forward to your prompt reply so we can move forward with this opportunity.