Twin Bubble Airlock, Hydrolocks for Fermenting, Brewing, Beer, Wine, Sauerkraut Set of 2

Very unhappy with this purchase. These are cheaply made and don't fit either of our fermenters, which are bucket fermenters with standard-sized holes for the airlock and rubber ring to hold the airlock in place. These airlocks don't stay in place at all, making them completely ineffective and not as described. I tried to return them and get a refund but the return window closed very quickly so now I'm not able to and am stuck with them. I recommend looking elsewhere if you need an airlock for beer brewing!