埃塞俄比亚采购需求：护栏，高速公路护栏，W梁护栏，护栏，护栏道闸，防撞护栏

I'm looking for guardrails with a specific length and thickness. The guardrails should be 4.33 meters long and have a thickness of 4mm. It's important that the materials used meet safety and durability standards, as they will be installed in a high-traffic area. Could you please provide me with detailed information on available options? I'm interested in pricing, lead times for production and delivery, and any bulk order discounts that might apply. Additionally, if there are different finishes or materials available, I'd love to hear about those too. Looking forward to your prompt response!