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Version: 2.0.0Built Date: 02/09/2026

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Cooler Master MasterBox Q300L mATX Case w/
IN
Cooler Master

Cooler Master MasterBox Q300L mATX Case w/

$56.23
3 - 10 Days
Secure Purchase
SKU: c85f002cbe448ddde41c66abff6c5f3a
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About this product

Patterned Magnetic Dustfilters Special pattern on the dust filter creates a unique outlook for the chassis. Modular I/O Panel The I/O panel can be adjusted to six different locations. On both side of the body you can install the I/O panel at the front, top or bottom. Multiple Positioning Options The case can be put in vertical or horizontal position. Edge-To-Edge Side Panel Show off your build through the full size transparent side panel. Clean Routing Space Behind the motherboard tray, it offers 28mm wide and spacy room for hidden cable management. Excellent Thermal Performance The open design of the perforated front, top and bottom guarantees excellent thermal performance. Fan and Radiator Support The front supports up to two 140mm fans and up to a 240mm radiator. The rear supports a 120mm fan or radiator and the top two 120mm fans. All to ensure you don't have to compromise on performance.Technical Information Motherboard Supported - Micro ATX Motherboard Supported - Mini ITX Number of Fans Supported - 6 Number of Fans Installed - 1 Installed Fan Size - 4.72"
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Cooler Master MasterBox Q300L mATX Case

The Cooler Master MasterBox Q300L is a versatile mATX case designed for gamers and PC builders alike. With its sleek, compact design, it fits seamlessly into any setup. Featuring a mesh front panel for optimal airflow, it ensures your components stay cool during intense gaming sessions. The case supports multiple cooling options, including space for up to six fans and radiators. Plus, the customizable I/O panel allows for easy accessibility. Its transparent side panel showcases your build beautifully, making it a perfect choice for those who value aesthetics as much as performance.