Note： 1. We are working hard and smart to fulfill your requirements. But if you have any problem when receive the parcel, please contact us by message or Trade Manager. We will get back to you in 24 hours and work with you until you are satisfied. Please DO NOT open dispute before communicate with us. 2. Upon delivery, please check your parcel before signed it. If you find the parcel is abnormal, you can refuse to sign and contact us. Shipping： 1. Orders will be shipped within the processing days after payment verification. To protect both the buyers and the sellers, it may take 24 hours for AliExpress to verify the payment. 2. We only ship to confirmed order address. Your order address MUST MATCH your shipping address. 3. Free shipping for all items, for some countries, you may pay extra shipping cost. The delivery time is 30-45 days. If you need fast shipment, please contact us. Return Policy: 1. All returned items MUST BE in the original condition. 2. Buyer pays return shipping cost. Feedback： 1. if you are satisfied with our products, we sincerely hope that you can leave us a all POSITIVE FEEDBACK. Meantime, we’ll aslo leave you positive feedback. 2. Of course,for any reasons, if you are not satisfied with our products, please contact us before leaving neutral or negative feedback. We will get back to you within 24 hours, and help you to solve problems. Airflow Inserts A unique ball bearing detent system allows the Airflow Inserts to lock securely into place with a satisfying *click*, with an added feature of this insert also acting as the chamber reducer to minimize any dead space for better flavour and vapour compression and production for a warming tasting vape.