波兰采购需求：800cc，巡洋舰摩托车，汉阳摩托车，中国摩托车厂，水冷，双缸

I'd like to inquire about black products you offer. Specifically, I'm interested in options that fit within a certain quality range and are suitable for our market needs. Can you provide details on material, availability, and any current pricing for these items? Additionally, if you have any catalogs or brochures showcasing your black products, please share those as well. I'd appreciate information on any bulk discounts or special offers that might apply. Thanks!