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🖤 Small Frame, Big Power: The MasterBox Q300L is where compact meets customizable.
The Cooler Master MasterBox Q300L is a compact Micro-ATX PC case designed for professionals who demand modularity and performance in a small footprint. It supports Micro-ATX and Mini-ITX motherboards, large GPUs up to 360mm, and CPU coolers up to 159mm. Featuring a perforated airflow design with a pre-installed 120mm fan, magnetic dust filters, and a fully adjustable I/O panel with six positioning options, it ensures optimal cooling and personalized setup. The transparent side panel showcases your build, making it perfect for office or home environments where style meets function.
















| ASIN | B0785GRMPG |
| Antenna Location | Gaming |
| Best Sellers Rank | #2 in Computer Cases |
| Brand | Cooler Master |
| Built-In Media | 1 computer case |
| Case Type | Mini-Tower |
| Color | Black |
| Compatible Devices | Micro-ATX and Mini-ITX motherboards, Cooler Master devices |
| Cooling Method | Air |
| Customer Reviews | 4.5 4.5 out of 5 stars (13,952) |
| Enclosure Material | Alloy Steel, Plastic |
| 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 | 15.39"D x 9.06"W x 15"H |
| Item Type Name | grocery |
| Item Weight | 480 Grams |
| Manufacturer | Cooler Master |
| Mfr Part Number | MCB-Q300L-KANN-S00 |
| Model Name | Q300L |
| Model Number | MCB-Q300L-KANN-S00 |
| Number of Fans | 3 |
| Other Special Features of the Product | Accomodates CPU Coolers, Adjustable, Dust Filter, Edge-To-Edge Panel, Fully Ventilated |
| Power Supply Maximum Output | 500 Watts |
| Power Supply Mounting Type | Bottom Mount |
| 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 |
| Warranty Description | 2 |
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