6U / 9U / 12U / 15U / 18U. External depth: 18” (450 mm) and 24” (600 mm) 22U / 27U. External depth: 24” (600 mm) Details SYSRACKS SRF 900 –Air Control System –4 Fans –1 PDU –1 Shelf –4 Casters –Hardware 50 pcs ...