Cooler Master Q300L (MCB-Q300L-KANN-S00)

Home Case Cooler Master Q300L

Product Specification

Compatibility
Motherboard Support : Micro-ATX, Mini-ITX
External Drive Bays : None
Internal Drive Bays
1 x 3.5"
2 x 2.5"
Expansion Slots : 4 x Full Height
Maximum GPU Length : 14.17" / 360 mm
CPU Cooler Height : 6.18" / 157 mm
Supported PSU Size : ATX
Maximum PSU Length : 6.30" / 160 mm
Cooling
Fan Mounting (Front)
2 x 120 mm
Or
2 x 140 mm
Fan Mounting (Rear)
1 x 120 mm
Fan Mounting (Side) : None
Fan Mounting (Top)
2 x 120 mm
Fan Mounting (Bottom)
1 x 120 mm
Fans Included (Front) : None
Fans Included (Rear) : 1 x 120 mm
Maximum Radiator Size (Front) : 240 mm
Maximum Radiator Size (Rear) : 120 mm
Fan Mounting (Internal) : None
Filter Locations : Bottom
I/O
Connections : 2 x USB Type-A (USB 3.1 / USB 3.2 Gen 1)
Audio Connections
1 x 3.5 mm Input
1 x 3.5 mm Output
Display Connections : None
Physical
Windowed Panel : Yes
Material : Steel, Plastic
Built-In Lighting : No
Cable Management Space : 1.10" / 28 mm
Dimensions (W x H x D) : 9.06 x 14.88 x 15.24" / 230 x 378 x 387 mm
Weight : 8.16 lb / 3.7 kg
Packaging Info
Package Weight : 10.04 lb
Box Dimensions (LxWxH) : 18.1 x 16.9 x 10.8"

Cooler Master MasterBox Q300L Micro-ATX Tower with Magnetic Design Dust Filter, Transparent Acrylic Side Panel, Adjustable I/O & Fully Ventilated Airflow

  (13490 Total Review)

Product Features

  • I/O panel can be adjusted in 6 different locations and the Case can be positioned: Vertical or horizontal
  • Edge to edge acrylic transparent side panel offers a full view inside
  • Body depth height: Can support normal size ATX power supply
  • Front magnetic design dust filter with open perforated front, top and bottom for high air performance
  • Extra space behind the motherboard tray for hidden cable management
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Out of Stock · Last Checked At: Oct 30, 2026
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Product Specification

Compatibility
Motherboard Support : Micro-ATX, Mini-ITX
External Drive Bays : None
Internal Drive Bays
1 x 3.5"
2 x 2.5"
Expansion Slots : 4 x Full Height
Maximum GPU Length : 14.17" / 360 mm
CPU Cooler Height : 6.18" / 157 mm
Supported PSU Size : ATX
Maximum PSU Length : 6.30" / 160 mm
Cooling
Fan Mounting (Front)
2 x 120 mm
Or
2 x 140 mm
Fan Mounting (Rear)
1 x 120 mm
Fan Mounting (Side) : None
Fan Mounting (Top)
2 x 120 mm
Fan Mounting (Bottom)
1 x 120 mm
Fans Included (Front) : None
Fans Included (Rear) : 1 x 120 mm
Maximum Radiator Size (Front) : 240 mm
Maximum Radiator Size (Rear) : 120 mm
Fan Mounting (Internal) : None
Filter Locations : Bottom
I/O
Connections : 2 x USB Type-A (USB 3.1 / USB 3.2 Gen 1)
Audio Connections
1 x 3.5 mm Input
1 x 3.5 mm Output
Display Connections : None
Physical
Windowed Panel : Yes
Material : Steel, Plastic
Built-In Lighting : No
Cable Management Space : 1.10" / 28 mm
Dimensions (W x H x D) : 9.06 x 14.88 x 15.24" / 230 x 378 x 387 mm
Weight : 8.16 lb / 3.7 kg
Packaging Info
Package Weight : 10.04 lb
Box Dimensions (LxWxH) : 18.1 x 16.9 x 10.8"