MasterBox E300L

The MasterBox E300L combines practicality with an accent of style. Able to support high end graphics cards (363mm), Micro-ATX, and Mini-ITX motherboards, the E300L also has generous room for easy assembly.


The front panel keeps ventilation subtle while the side panel offers additional cooling support. Stand out from the rest with a color accent.


With a compact and sensible design, the E300L is a cost effective chassis for your computing needs.


Choose Your Style

MasterBox E300L

  • Brushed Front Panel
  • Security Lock Anchor
  • Side Panel with Air Vent
  • Multiple Trim Colors Available

Multiple Trim Colors

Stand out from the rest with a nice color accent. The E300L has 3 different colors of side trims available to suit your style. Red, Blue and Silver

Choose Your Color


Brushed Front Panel

The brushed texture of the front panel adds an elegant element to your workstation or office.


Fan Support &Security

The MasterBox E300L comes pre-installed with a single 120mm fan in the front. The front supports a single 80mm, 90mm and 120mm fan.
The rear supports a single 80mm or 90mm fan.


Side Panel Ventilation

The perforated side panel allows for additional airflow for direct cooling on the CPU.


Main Components Clearance

The MasterBox E300L case supports CPU-Coolers up to a height of 148mm, Graphic Cards up to a length of 363mm and Power Supplies up to a length of 180mm.

Product Name MasterBox E300L
Product Number MCB-E300L-KN5N-B00 (Red)
MCB-E300L-KN5N-B01 (Blue)
MCB-E300L-KN5N-B02 (Silver)
Available Color Red, Blue, Silver
Materials Steel, Plastic
Dimensions (LxWxH) 448 x 180 x 364mm
Motherboard Support Micro-ATX, Mini-ITX
Expansion Slots 4
5.25" Drive Bays 1
3.5" HDD Drive Bays 2
2.5" SSD Drive Bays 3
I/O Port USB 3.0 x 2, Audio In / Out
Pre-installed Fan(s) Front 120mm x 1
Fan Support Front 80mm x 1 / 92mm x 1 / 120mm x 1
Top N/A
Rear 80mm x 1 / 92mm x 1
Bottom N/A
Radiator Support Front N/A
Rear N/A
Clearances CPU Cooler 148mm
GFX 363mm
PSU 180mm wo/ODD, 160mm w/ODD
Power Supply Support Top mount, ATX
EAN Code 4719512071397 (MCB-E300L-KN5N-B00, Red)
4719512071618 (MCB-E300L-KN5N-B01, Blue)
4719512071373 (MCB-E300L-KN5N-B02, Silver)
UPC Code 884102043895 (MCB-E300L-KN5N-B00, Red)
884102044113 (MCB-E300L-KN5N-B01, Blue)
884102043871 (MCB-E300L-KN5N-B02, Silver)