This is a standard 6 gallon glass carboy for 5 gallon batches. A 5 gallon carboys are not l;arge enough for the head space for a 5 gallon bear recipe due to the blow off of the fermentation. It is also not as heavy or as unwieldy as the 7 gallon glass carboy. Glass is the most neutral reacting fermenter and great for long term fermentations such as mead or wine. They are fragile and require special handling and care. These are not included in free shipping offers.