Air lock. it is necessary to monitor fermentation and prevent back contamination. the task of the airlock is to remove the co2 that occurs during the fermentation, while preventing the entry of air from the outside into the fermenter, thus preventing contamination and oxidation. after disinfecting the airlock with its stopper, fill it halfway with clean water (or water with disinfectant) and attach it to the fermenter. the company reserves the right to make changes in the product images. more than 100 stocks are offered to be sold at the campaign price. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.