美国采购需求：镀锌钢卷、彩涂钢卷、彩涂钢卷、H型钢、钢筋、角钢

I'm looking to gather some details regarding your product offerings. Specifically, I'm interested in understanding the specifications, pricing, and available quantities for various items in your catalog. Could you please provide insights on your latest inventory and any popular models that you have available? Additionally, I'd like to know about lead times, shipping options, and any volume discounts you might offer. It's important for us to align on product quality and any certifications you possess. Your prompt response will greatly assist us in making informed purchasing decisions. Looking forward to your reply!