巴拉圭采购需求：碳钢管、钢管、钢管、碳管、碳管、ERW钢管

I'm reaching out to inquire about the pricing and detailed specifications for a particular item I'm interested in sourcing. Could you provide me with the cost breakdown, including any potential bulk purchase discounts? It would be great to also know the available variations, lead times for production and shipping, and any minimum order quantities I should be aware of. Additionally, please share any relevant certifications or quality standards the item meets, as well as warranty information if applicable. I'm looking to make a decision soon, so I would appreciate a prompt response. Thank you!