Brushed Front Panel
A brushed finish spans the entire front panel for an elegant and minimalistic design.
Hexagon Gleam
If an optional, illuminated fan is installed, the Cooler Master hexagon logo will capture light from the fan and emit a glow on the front panel.
Mesh Intakes
Large, mesh intakes span each side of the front panel to provide additional airflow to system.
With/Without Odd Support
Depending on preference, an ODD version of the chassis is available. If an ODD is not preferred, a cleaner appearance and more cooling options on the top and front panels are supported.
Adaptable Drive Cage
The drive cage is (re)movable, able to shift toward the front to accommodate for PSU space, backwards to provide additional radiator space, or even completely removed.
Versatile Cooling Options
Support for up to six fans and front, top, and rear radiator support ensure that performance is not compromised.
Room For Upgrades
Support for up to a 344mm graphics card, a 166mm CPU cooler, and up to a 325mm PSU in length provides room for upgrades to stay ahead of the game.
| Materials | Steel |
| Radiator Support - Rear | 120mm |
| Power Supply Support | Bottom Mount |
| Dust Filters | Top |
| 5.25" Drive Bays | N/A |
| Clearance - PSU | 140mm (HDD cage in backmost position) |
| Pre-installed Fans - Top | N/A |
| Dust Filters | Front |
| Warranty | 2 years |
| 3.5" Drive Bays | 2 |
| Materials | Plastic |
| Color(s) | Black |
| Series | MasterBox Series |
| Size | Mini Tower |
| 2.5" Drive Bays | 2 |
| Dust Filters | Bottom |
| Pre-installed Fans - Rear | 1x 120mm (Black) |
| Power Supply Support | ATX |
| Fan Support - Rear | 1x 120mm |
| Radiator Support - Front | 280mm |
| Radiator Support - Front | 240mm |
| Radiator Support - Top | 240mm |
| Fan Support - Front | 2x 140mm |
| Radiator Support - Front | 140mm |
| Motherboard Support | Micro ATX |
| Radiator Support - Top | 120mm |
| Radiator Support - Front | 120mm |
| Materials | Mesh |
| Fan Support - Top | 2x 140mm |
| Fan Support - Front | 3x 120mm |
| Cable Routing | 18-22mm |
| Clearance - PSU | 325mm (w/o front radiator & HDD cage) |
| Expansion Slots | 4 |
| Motherboard Support | Mini ITX |
| Fan Support - Top | 2x 120mm |
| Clearance - CPU Cooler | Steel: 167mm |
| Pre-installed Fans - Front | N/A |
| Weight | 5.47kg |
| Fan Support - Front | Mount behind the front plate |
| I/O Panel | 1x 3.5mm Headset Jack (Audio+Mic) |
| Clearance - GFX | 344mm |
| I/O Panel | 2x USB 3.2 Gen 1 (USB 3.0) |
| Dimensions (L x W x H) | 411 x 210 x 410mm (Steel Incl. Protrusions) |
| Dimensions (L x W x H) | 396 x 210 x 400mm (Excl. Protrusions) |
| Model Number | MCB-B400L-KNNN-S00 |