美国采购需求：10 英尺钢制 4 英寸方形灯杆、15 英尺 - 方形钢制钻孔灯杆 - 4 英寸、20 英尺钢制方形灯杆、20 英尺铝制 4 英寸方形灯杆、所有产品、LED 区域照明灯

I'm reaching out to inquire about the pricing for straight square poles that I'm interested in. Specifically, I need five poles that are 15 feet in length, with a width of 5 inches, and manufactured with 11-gauge steel. It would be great if you could provide me with your best price for this order. Additionally, I would like to know about the availability, any bulk order discounts, and the estimated lead time for delivery once the order is placed. If there are other relevant specifications or options for customization, please include those details as well. Looking forward to your prompt response!