Cooler Master MasterBox MB400L mATX Mini Tower Case
Features
MASTERBOX MB400L WITHOUT ODD
SENSIBLE BY DESIGN
- Brushed Front Panel
- Hexagon Gleam
- Mesh Intakes
- Without ODD Support
- Adaptable Drive Cage
- Versatile Cooling Options
- Room For Upgrades
*This model does not have the ODD bay pictured below

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.
*This model does not have the ODD bay pictured below

WITHOUT ODD SUPPORT
With no ODD, a cleaner appearance and more cooling options on the top and front panels are supported.
*This model does not have the ODD bay pictured below

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.
*This model does not have the ODD bay pictured below

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.

Specifications
Technical Specifications
| Model Number | MCB-B400L-KNNN-S00 |
|---|---|
| Color | Black |
| Materials | Mesh, Plastic, Steel |
| Dimensions (L x W x H) | 411 x 210 x 410mm (Steel Incl. Protrusions), 396 x 210 x 400mm (Excl. Protrusions) |
| Weight | 5.47kg |
| Motherboard Support | Micro ATX, Mini ITX |
| Expansion Slots | 4 |
| 5.25" Drive Bays | N/A |
| 3.5" Drive Bays | 2 |
| 2.5" Drive Bays | 2 |
| I/O Panel | 1x USB 3.2 Gen 1 (formerly USB 3.0), 1 x USB 2.0, 1x 3.5mm Headset Jack (Audio+Mic) |
| Pre-installed Fans - Top | N/A |
| Pre-installed Fans - Front | N/A |
| Pre-installed Fans - Rear | 1x 120mm (Black) |
| Fan Support - Top | 2x 120mm, 2x 140mm |
| Fan Support - Front | 3x 120mm, 2x 140mm, Mount behind the front plate |
| Fan Support - Rear | 1x 120mm |
| Radiator Support - Top | 120mm, 240mm |
| Radiator Support - Front | 120mm, 140mm, 240mm, 280mm |
| Radiator Support - Rear | 120mm |
| Clearance - CPU Cooler | Steel: 167mm |
| Clearance - PSU | 140mm (HDD cage in backmost position), 325mm (w/o front radiator & HDD cage) |
| Clearance - GFX | 344mm |
| Cable Routing | 18-22mm |
| Dust Filters | Top, Front, Bottom |
| Power Supply Support | Bottom Mount, ATX |
| Series | MasterBox Series |
| Size | Mini Tower |
| Brand | Cooler |
|---|---|
| Product Type | PC Parts |
Shipping Information
- Free NZ-wide shipping on orders over $299
- Standard delivery 2–5 business days
- Rural delivery may take an additional 1–2 days
- Same-day dispatch for orders placed before 2pm (weekdays)
Returns Policy
- 7-day returns on unused items in original packaging
- Faulty or damaged products covered under warranty
- Contact our support team to initiate a return









