Please confirm availability before purchasing. If the item is out of stock, the order will be canceled as it cannot be shipped. This was a gift from my brother, but I don't know anything about it. Please examine the images and only purchase if you understand the item. The key number is 794, and it opens, but it has a quirk and is difficult to open. It opens with some fiddling. The plastic part of the hose in the 13th image of the jacket is a little sticky. Please examine all images and only purchase if you understand the item. Please refrain from purchasing if you are a perfectionist. I am not knowledgeable and am ignorant, so there is no warranty to prevent any trouble. #Diving Diving set Mares ABYSS Regulator Ya