埃塞俄比亚采购需求：碳钢管、钢管、钢管、碳管、碳管、ERW钢管

I am looking for detailed pricing and specifications for a certain product we're interested in. We want to understand the cost structure, including any bulk purchase discounts and additional fees that may apply. Additionally, please provide insights on the product features, available variants, and any relevant warranty or service options. This information will help us make a more informed decision moving forward. Thanks!