The 10" Stainless Steel False Bottom fits our 10 gallon Rubbermaid coolers (loosely). Very easy to remove from the 10 Gallon cooler for cleaning, but this false bottom will not cover the entire bottom of the cooler, which is fine because the false bottom is domed. If you prefer a tight fit in your cooler, use the 12" false bottom instead. 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.