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🖤 Master your space, flaunt your build.
The Cooler Master MasterBox Q300L is a versatile Micro-ATX mini-tower case featuring a fully adjustable I/O panel, edge-to-edge transparent acrylic side panel, and a magnetic dust filter system for superior airflow. Designed for compact builds without sacrificing performance, it supports large GPUs up to 360mm, CPU coolers up to 159mm, and offers flexible cable management options. Ideal for professionals and gamers seeking a sleek, customizable, and efficient PC case.












| ASIN | B0785GRMPG |
| Antenna Location | Gaming, General Computing |
| Best Sellers Rank | #43,441 in Computers ( See Top 100 in Computers ) #266 in Computer Cases |
| Brand | Cooler Master |
| Built-In Media | 1 computer case |
| Case Type | Mini-Tower |
| Case type | Mini-Tower |
| Color | Black |
| Colour | Black |
| Compatible Devices | Micro-ATX and Mini-ITX motherboards, Cooler Master devices |
| Cooling Method | Fan |
| Customer Reviews | 4.5 out of 5 stars 13,562 Reviews |
| Enclosure Material | Alloy Steel Plastic |
| Fan Size | 120 Millimeters |
| Global Trade Identification Number | 00884102038006, 00884102095313, 04719512065488 |
| Hard Disk Form Factor | 3.5 Inches |
| Internal Bays Quantity | 1 |
| Item Dimensions D x W x H | 39.1D x 23W x 38.1H centimeters |
| Item Type Name | grocery |
| Item Weight | 480 Grams |
| Manufacturer | Cooler Master |
| Material | Alloy Steel Plastic |
| Mfr Part Number | MCB-Q300L-KANN-S00 |
| Model Name | Q300L |
| Model Number | MCB-Q300L-KANN-S00 |
| Motherboard compatability | Micro-ATX and Mini-ITX |
| Number of Fans | 3 |
| Other Special Features of the Product | Magnetic Dust Filters |
| Power Supply Maximum Output | 500 Watts |
| Power Supply Mounting Type | Bottom Mount |
| Recommended uses for product | Gaming, General Computing |
| Supported Motherboard | Micro-ATX and Mini-ITX |
| Total Expansion Slots Quantity | 4 |
| Total USB 3.0 Ports | 2 |
| Total Usb Ports | 2 |
| UPC | 884102095313 884102038006 |
E**O
Micro Case with ATX Mobo
Best casing I ever bought. Small and light. My gigabyte 1080 fit this inside and still more space inside.
S**A
Deserve 1 star
At least they answered me well, but the product was not I expected
I**A
Good product for best price
What a nice casing and gave a good image for my old pc
Trustpilot
1 month ago
4 days ago