1. Comply with ANSI/EIA; RS-310-D; DIN41491; IEC297-2; DIN41494; DART7; GB/T3047.2-92 standard; Compatible with 19" international standard, metric system and ETSI standard. 2. Reliable structure, static loading capacity: 500KG(Optional castors and plinth) 3. Adjustable feet and heavy duty castors are available simultaneously, moving convenience, fixing reliable. 4. Baying together easy, quickly, efficiently and firmly. 5. Glass front door, steel rear door, easily assembled and operated. 6. Optional cable entry on top cover and bottom panel, removable front&rear door and side panel facility, ventilation and rat-proof on the bottom. 7. Varies optional accessories, reliable quality. 8. Optional opening hole and varies specification upon customers' special requirements.