Unused 40" diameter Koch Extraction Column, 304L stainless steel construction, 40" diameter upper section x 20" diameter middle section x 40" diameter lower section x 53'1" overall straight side, dished bottom, rated 50 PSI and full vacuum @ 400 degrees F internal, sectional design with 40" diameter x 10' long upper and lower sections, 20" diameter x 34' middle section with 31' plate stack section divided into (3) sections with top entering drive with mechanical seal, 825 gallon capacity, certified by Dusenbery Eng., Serial No. 1544A, National Board No. 3528, new 1998 and never installed.