美国采购需求：UPVC型材、铝型材、系统门窗、市政管道、建筑管道、燃气管道

I'm currently exploring options for sourcing products and came across your company. Could you provide me with your latest catalog? I'm particularly interested in understanding the variety you offer and the specifications of your products. Additionally, it would be helpful if you could share your bulk pricing details. I'm looking to evaluate potential cost implications and see how we can establish a beneficial partnership. If you have any special promotions or minimum order quantity specifics, please include that info as well. Your prompt response would be greatly appreciated as I am eager to move forward with my sourcing decisions.