... & ISO14001:2004 Detailed Product DescriptionHigh density vented hole front&rear door,static loading capacity:500KG(Optional castors and plinth)... 1 ... , and fixing reliable. 4.High density vented hole front&rear door, meeting the requirements of mechanical protection and ventilation. ... Entry on top cover and bottom panel, removable front&rear door and side panel facility, ventilation and rat-proof ...