9" stainless steel false bottom. False bottoms act as a strainer, keeping grain from clogging the spigot in your lauter tun when all grain brewing. The domed shape of a false bottom keeps grain up off the bottom of the mash tun. The stainless elbow fitting in the center of the false bottom has a 3/8" barb which allows outflow of liquid from beneath the dome. Use hi-temp tubing to connect to the spigot. Fits 5 gallon coolers.