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
















































































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Cooler Master MasterBox Q300L (MCB-Q300L-KANN-S00)
Cooler Master
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Cooler Master MCB-Q300L-KANN-S00
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.
Return Policy |
Time to Return |
Standard Return Policy |
Refund or Replacement within 45 days of the delivery date. All products that fall under the Standard Return Policy qualify for our 45-Day Hassle-Free Returns. Please see the section above for more details. |
Replacement Only Return Policy |
Replacement within 45 days of the delivery date. |
Manufacturer Only Return Policy |
Covered by the manufacturer's warranty. Please refer to the terms and conditions for the manufacturer's warranty or contact the manufacturer. |
Holiday Extended Return Policies |
Extended Holiday Return Policy.Qualifying purchases of products displaying the " Extended Holiday Return Policy ", from November 1st, 2022 to December 25, 2022, are eligible for a Refund or Replacement until January 31, 2023. Extended Holiday Replacement-Only Return PolicyQualifying purchases of products displaying the " Extended Holiday Replacement-Only Return Policy ", from November 1st, 2022 to December 25, 2022, are eligible for a Replacement until January 31, 2023. |