server racks, install caster and support feet at the same time; ... and reliable operation with ventilation rate above 55%, turning angle above 120 degrees;4:optional two cool fans and four ... .Material:SPCC cold rolled steelThickness:mounting profile:2.0mm /mounting angle: 1.5mm / others: 1.2mmSurface finish: Degrease, pickling, pfosphoric, ... 1000mmHeight:18U,22U, 27U, 32U, 37U, 42U 47U server racks