Standard:Comply with ANSI/EIARS-310-D, IEC297-2,DIN41491, PART1,DIN41494;PART7, GB/ patible 19"international standard, Metric standard and ETSI standard. Main characters and performance: 1. 9-Bend welded frame, Bigger Static load capacity. 2. Noble and elegant Appearance , High density perforated split rear door, unique perforated front door. provides more open spaces for enough air flow to cool and guarantee a safe temperature for any server 3 Optional Tempered glass front door with international popular color. 4'.Quick and easy off side doors 5. 2.5 "Castors and Leveling feet, move conveniently and place steadily. 6. Mutual Change gemel..of door 7. Top cable entry hole with plastic cover 8. Adjustable depth (by 25mm )and volume (by 1U ) 9.Surface treatment: degreased, phosphorized, Electro-coating primer, electrostastic powder coating. 10.Main color: gray or black 11: :Excellent cold rolled steel , thickness 2.0 ~ 1.2mm 12, OEM available