-Letter Cabinet Features: 1. Rugged glass door upper part 2. 3. 4. adjustable side panels can be closed lower multiple channel alignment, alignment hole at the bottom of a large size can be adjusted as needed around 5. Adjustable square hole, printed U-digit mark 6. The rack-mount chassis, to the cabinets at the bottom over the line, and the bottom of the air inside the cabinet 7. 8. 9. The machine according to a ground screw can be installed side stained and free installation Article 10. The bore hole 11. The cabinet has fans to easily open the door back door