The 9" Stainless Steel False Bottom fits our 5 gallon Rubbermaid coolers. False bottoms are used to convert coolers or plastic buckets into mash/ lauter tuns. Constructed from 304 stainless steel these false bottom's will not float. Dome height is 1/2" for the 9", 10" ,and 12" diameter false bottoms. Comes with a 3/8" barbed 90° stainless steel elbow hose fitting in the center to draw the wort from beneath the dome. Made from stainless steel with 3/32 perforated holes on 5/32 centers. The barb fitting is 3/8 inch.