I got the cooler from work for free, I actually got two. They are 5 gallon, and I had read a fourm on building a mash tun and without thinking I just used the same shopping list for the brass parts without measuring the size of the hole from the spigot. After I had realized it, it was 8:30 at night and I didn't want to get back to lowes so I just drilled my own hole. It was also more expensive for the bigger parts and I like to do everything on a cheap budget