DescriptionMade of material for durable and long lasting use, safe, easy to use and easy to clean.These wine vent designed to prevent back-flush in the fermentation chamber, also for secondary fermentation of homebrewed beer, wine, cider, juice, and more.Feature- Color: As shown. - Material: plastic. - Size: About 17x5x1.5cm. - Made of material for durable and long lasting use. - For secondary fermentation of homebrewed beer, wine, cider, juice, and more. - Can be used for long-term repeated use on fermenters. - Clear, transparent plastic standard traditional fermentation airlock that gives you a clear look inside. - Suitable for using in home, bar, party, etc.