Applicable Medium:Air or low corrosive gas. We will offer solutions to such cases. It takes approximately 15-25days(USA, CA, AU, UK). Other country 12-35 days European, South America, Africa, etc. You pay us what you see on the invoice, i.The sale of this item may be subject to regulation by the U. Food & Drug Administration and state and local regulatory agencies. If you have questions about legal obligations regarding sales of medical devices, you should consult with the FDA's Center for Devices and Radiological Health. This dental items is not meant to replace your doctor diagnostic. It is mainly for your piece of mind and comfort.