加拿大采购需求：碳钢管、钢管、钢管、碳管、碳管、ERW钢管

I'm interested in gaining more insight into the item that I inquired about earlier. Could you please offer detailed specifications, including dimensions, materials used, and any available color options? Additionally, information concerning the production process and lead time for delivery would be greatly appreciated. Furthermore, if there are any quality certifications or testing standards that this item meets, please include that information as well. I'm also curious about bulk order pricing and availability. These details will help me in making a more informed purchasing decision, so your prompt response would be very helpful!