4U Rack Folding Heavy duty

A single rack unit is exactly 1.75" (44.45 mm) in height. When a piece of equipment is designed to be larger than a single rack unit (1U), it will be referred to as multiple of rack units and written such as 2U, or 6U. For this example, will mean a server of 6U is 10.5" or 266.7 mm in height.A U is a standard unit of measure for designating the height in computer enclosures and server rack cabinets. A rack unit is abbreviated as U or RU with a number prefix. A U equals 1.75 inches, so a 4U chassis would be 7 inches high. A 40U rack cabinet would be 70 inches high.