Set of 12 3-piece airlocks for fermentation projects. Arrives pre-assembled. Simply remove the protective foam insert, clean the pieces and begin using your new airlocks within minutes of delivery. Now it is time to begin experimenting to create the perfect craft beer, healthy sauerkraut or perfect wine. Year of Plenty airlocks are crafted from tough, thick and strong plastic. They are not flimsy or cheap. They can be used over and over again for all your fermenting needs.