印度尼西亚采购需求：不锈钢板、钢管、结构钢、不锈钢板材、钢管、角钢

I'm looking for checkered plates made from a durable material, specifically in a thickness of 12mm. The size I'm interested in is approximately 5x20 feet. It's essential that the plates meet certain quality standards suitable for various industrial applications. Could you provide me with pricing information, availability, and lead times for this material? Additionally, if there are any minimum order quantities or discounts for bulk purchases, please let me know. I'm keen on understanding the specifications and any other relevant details that could help in the decision-making process. Thank you!