Aqua Lung double regulator set's annual service (2 x 1. stage, 2 x 2. stage). The price includes the service kit and maintanance work made by a licensed Aqua Lung -technician. You can bring your set to our shop and you will get notice as the regulator is serviced. If you choose to send your regs to us by post, please pack it very carefully so it doesn't get destroyed on its way here. Please also add information, what you want us to do to it (annual service etc.) and add your contact information with. We will send the set back to you to your local post office by cash on delivery. The service fee will be added on the price of course.