Sturdy yet lightweight glass makes this the perfect for fermenting your favorite beer or wine. This can also be used for brewing Iced Coffee, tea or lemonade and the jar will keep it cold and delicious. The 4″ wide mouth is great for reaching deep inside and also for cleaning. Constructed of USDA certified food grade glass to avoid absorption of flavors and leaching of chemicals, dishwasher safe. Dimensions: 10″ tall, 4″ wide opening. The lids are made of plastic so it will not corrode like metal lids. Dual scale thermometers stick to glass fermenter to get an accurate temperature reading. Readings are in 2 Degree increments. Using this liquid crystal thermometer makes it easy to know the temperature of your fermenting beer or wine.