we an provide free samples for our clients to sent and verify the quality of our goods. And we have good After-service.Tianjin Airuipu   Technology Co., Ltd. is located in Tianjin. Our company has a first-class sales team and logistics team, for you to do product after-sales service and safe transportation services. If you do not receive our product, we can send you a second time. Our products are exported to the United States, Canada, Mexico and other more than 20 countries in the world. We are always looking for long-term clients.