南非采购需求：侧壁货运半挂车，购买，最优价格，侧壁拖车出售，耐用货运拖车，重型半挂车

I'm interested in acquiring semi trailers for my operations and would like to gather more specific information. Could you provide details on the different models available, including their specifications, load capacities, and any customization options? I'm also keen to understand the pricing structure and potential bulk order discounts. Additionally, please let me know about the lead times for production and delivery, as well as any warranties or service packages you offer. I'm looking for high-quality trailers that can meet my logistics needs effectively, so any insights on your manufacturing processes or materials used would be appreciated. Looking forward to your prompt response!