马来西亚采购需求：碳钢管、钢管、钢管、碳管、碳管、ERW钢管

I'm looking for a 1/2-inch stainless steel pipe and would appreciate more details about your available options. Specifically, I need to know about the grades of stainless steel you offer, as well as the standard lengths and whether you provide any customization in terms of diameter or wall thickness. Additionally, please share your pricing structure, including any bulk order discounts, and lead times for delivery. If you have any certifications or quality assurance processes in place, I would like to learn more about those as well. Looking forward to your prompt response!