EASY, SAFE, SIMPLE: Includes 6 3-piece preassembled airlocks. All parts are BPA-free | CLEAR, STURDY, LONG-LASTING: Each airlock is made from crystal-clear, strong plastic and assembled | VERSATILE FERMENTING EQUIPTMENT: Airlocks can be used for a variety of purposes - to preserve foods (sauerkraut, pickles) or create delicious wine and beer | REQUIRED BREWING SUPPLIES: Airlocks allow gas bubbles to escape during the fermentation process while preventing oxygen from ruining your ferments and brewing activities | EASY TO USE AND CLEAN: Every home brewer and fermenter knows how and why to use an airlock