... quality steel sheetSurface Finish: degrease, pickling, phosphorescence, ablution and AkzoNobel PowderColor: RAL7035 (light gray) or RAL9005 ( ... to ease shipment and assembly;2)Quickly removable side panels, front and rear doors;3)High-density vented front door, with ... ventilation amounts to 75%, creates superior airflow environment horizontally;4)With double-opening structure, the rear ...