美国采购需求：通带滤波器，射频带通滤波器，产品，射频腔体滤波器，射频微波滤波器

I'm interested in placing an order for four units of your specified product. Could you please provide me with a detailed quote, including the total cost, shipping fees, and estimated delivery time? Having clarity on any bulk purchase discounts or additional charges would be helpful as well. For your reference, my shipping address is 582 Eccles Ave, South San Francisco, CA 94080. If you require any additional information or have questions regarding the order, feel free to reach out. Looking forward to your prompt response so we can proceed smoothly!