加拿大采购需求：金属 U 型槽柱、标志柱、U 型槽、U 型柱中国制造、1-3 葡萄园棚架柱、1-8 标志柱

I'm looking for detailed information on high-strength U-channel sign posts. Specifically, I'd like to know about the materials used, dimensions, and the weight capacity for various applications. If you have any available specifications or technical data sheets, that would be super helpful. Additionally, could you provide insights on pricing, minimum order quantities, and lead times? I'm also interested in knowing whether you have any options for custom designs or finishes. Looking forward to your prompt response to help me make an informed decision.