A great way to get into all grain brewing! These coolers work very well as mash tuns, as you'll notice barely any temperature loss throughout your 1hr+ mash. Internal dimensions are 18.375"H x 12.875"D. External dimensions are 20.875"H x 15.875"D with lid on. Comes with our stainless Bulkhead and Ball valve, 6" thermometer, and our 12" stainless steel false bottom.