尼日利亚采购需求：镀锌钢卷、Zm钢卷、镀铝钢卷、H型钢、钢桁架、铝卷

I'm interested in sourcing a product with specific dimensions: Length of 200mm, Width of 90mm, and a size measurement of 0.12. The color should be white, and it needs to weigh approximately 2850 grams. I'm looking to purchase a total quantity of 27 tons. Please provide detailed information regarding the product specifications, pricing, lead times, and any relevant shipping terms. Your prompt response would be appreciated as I am keen to move forward with this procurement. Thank you!