巴基斯坦采购需求：平底袋、牛皮纸袋、宠物食品袋、自立袋、蒸煮袋、薄膜卷

I'm looking for some paper bags that measure 12x20 inches with an additional 4-inch gusset. It's crucial for us to ensure these bags are sturdy and reliable, as they will be used for a variety of applications. Please provide details on the materials you use, as well as any customization options available, like printing or colors. Could you also share your pricing information, including any bulk order discounts? We'd like to know about your production capacity and lead times, as we have a few upcoming projects in mind. If you have samples available, that would help us evaluate the quality of your products. Looking forward to your prompt response!