美国采购需求：6061铝管，6061铝管材，铝合金管，铝合金管材，铝管，铝管

We're looking for pricing on a specific product with the following details: made from Aluminum 6061-T6, with an outside diameter of 748mm, an inside diameter of 600mm, and a length of 1000mm. The estimated weight is around 423 kg per unit. Please provide separate quotes for minimum order quantities of 5, 10, and 20 units. Additionally, we need an immediate order of 7 units. We'll need the EXW pricing to our facility in Fenggang, Dongguan, and the delivery address is: No. 66, Wangjiao Industrial Zone, Tiantangwei Village, Fenggang Town, Dongguan, China. Can you also confirm the lead time for the initial 7 units and the subsequent MOQ tiers? No samples needed for this raw material order. You can add me on WeChat at 13316651535 for quicker communication. Thanks!