Used 304-Stainless Steel Column Rated 53 PSI/FV @ 150 deg F. 2 Sections: 1st Section - 16" OD x 6' 11" Straight Side; Second section - 30" OD x 10. 5" Straight Side. (AL - 20' 11.5") straight Side. SS Heads. Nozzles: (3) 8", (2) 4", multiple vent nozzles. Lug mounts. Built by Five Star Industrial Services, 1993. S/N: 2010-B, NB# 416. Previous use: Styrene Recovery. U-1 & drawing on file.