巴基斯坦采购需求：电动自行车电机、中置电机、滑板车轮毂电机、轮毂电机、电机套件、电动滑板车电机

I'm looking to gather some detailed information regarding the rear and back motors for 350W and 700W models. Specifically, I would like to know the pricing, availability, and any bulk order discounts you might offer for these motors. Additionally, could you provide specifications, such as performance metrics and any warranty options? It would be great to get a comparison between the two motor types, including any differences in efficiency or durability. If there are other related products or accessories that complement these motors, please include that info as well. The more details you provide, the better I can assess my purchasing needs. Thanks!