尼日利亚采购需求：U型螺栓、不锈钢螺栓、铁轨材料、锚、电镀、铆钉

I'm looking to source aluminum blind rivets in two specific pin sizes: 4mm and 5mm. For each size, I'm interested in ordering 200 cartons. Please provide me with details regarding the available specifications, including the pricing, lead time for delivery, and any minimum order requirements you might have. Additionally, it would be helpful to understand your production capacity and any options for bulk discounts. If you have product samples or can share relevant certifications, that would be greatly appreciated. Looking forward to your prompt response so we can move forward with this potential order.