肯尼亚采购需求：医疗用品、实验室设备、诊断工具、医疗器械、实验室检测试剂盒、药品

I'm looking for custom QR code stickers specifically designed for Instagram promotion. It would be great if you could offer a variety of sizes and finishes to suit different applications, such as packaging and marketing materials. Also, please let me know about the available color options and whether you can provide a sample before we proceed with a bulk order. I'm interested in understanding the pricing structure and lead times for this product as well. Thanks!