斯里兰卡采购需求：UPVC型材、铝型材、系统门窗、市政管道、建筑管道、燃气管道

I'm looking for high-quality door and window profiles that meet specific industry standards. We're focusing on durability and energy efficiency, so I would appreciate if you could share details about the materials used, any certifications your products might have, and the range of finishes available. Additionally, I'd like to know about your production capabilities, lead times, and minimum order quantities. If you have a catalog or samples of your profiles, that would be great to evaluate. Please get back to me with your pricing structure and any ongoing promotions you might have. Looking forward to your prompt response!