美国采购需求：布儒斯特角、浓度梯度晶体、倍频晶体、感应炉晶体、中红外晶体、钕玻璃激光器

I hope you're doing well! I'd like to request a detailed quote for the products I'm interested in. Specifically, I need to know the pricing tiers based on different quantities, any discounts available for bulk orders, and information on shipping costs. If you could also include lead times for production and delivery, that would be super helpful. Additionally, it'd be great to know about any warranties, return policies, or other terms and conditions that may apply. I'm looking forward to your prompt response, as this information is crucial for my decision-making process. Thanks in advance for your assistance!