This is a used heater that is in good condition. It mounts in a 10 inch 150 lb flange. Projection in to the vessel is 51 inches. This unit was used to heat oil for a biomass drying unit, it comes with a removable shell. The insulated shell is 10x54in inside and 16x55in outside and has 2 ports with 2" and a 2-1/2" 4-bolt flange connections. The assembled unit is 66in long overall. It also has a 1/2" NPT drain port. In prior application oil was pumped through this unit to be heated and then pumped to the dryer unit. This unit is made up of 36 Caloritech L99S 480V 2361W HEATING ELEMENTS.