A great way to get into all grain brewing! These 10 gallon coolers work very well as mash tuns for five and ten gallon batches, as you"ll notice barely any temperature loss throughout your 1hr+ mash. Comes with a stainless ball valve cooler kit and a 12 inch stainless steel false bottom. The barb size on the mash tun for the output is 1/2". All metal parts are stainless steel.