Part # | Style | Rack Unit | Dimensions --- QWM-ED-WM-1U-BP | Solid Blank | 1U | 19"W x 1.75"H x 0.375"L --- QWM-ED-WM-2U-BP | Solid Blank | 2U|19"W x 3.50"H x 0.375"L --- QWM-ED-WM-VENT-1U | Vented Blank | 1U | 19"W x 1.75"H x 0.375"L --- QWM-ED-WM-VENT-2U | Vented Blank | 2U | 19"W x 3.5"H x 0.375"L --- QWM-ED-WM-VENT-3U | Vented Blank | 3U | 19"W x 5.25"H x 0.375"L --- QWM-ED-WM-VENT-4U | Vented Blank | 4U | 19"W x 7"H x 0.375"L