Used 100 SCFM Gas Drying Inc. (GDI) Heatless (Pressure Swing) Desicant Air Dryer, Model 6/EV, rated 100 SCFM @ 120 to 150 psig, comes with two tanks. Tank A rated 165 psig @ 200 F, min -25 F @ 165 psig, serial #6259-a, Built 2001; Tank B rated 165 psig @ 200 F, min -25 F @ 165 psig, serial #6259-b, Built 2001. 37" L x 22" W x 89" H OAD, est. weight 500#.