The Tripp Lite SR42UBMD 42U mid-depth smartrack premium enclosure comes with doors and side panels installed. It features a massive front-to rear-ventilation capacity that meets or exceeds server manufacturer requirements. Its integrated baying tabs make it easy to combine multiple enclosures in rows for data center applications. This enclosure is also compatible with hot-aisle / cold-aisle configurations. Its front and rear pairs of vertical rails have square mounting holes that are adjustable in quarter-in increments from 4 – 31 in. Adjustment is quick and an easy-view depth index ensures consistent rail placement without requiring time-consuming measurements. Each rack space within the enclosure is numbered for ready reference. All components of the SR42UBMD are grounded to the enclosure frame.