Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 9 - Jul 14
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Cooler Master MasterBox Q300L Case, Black, Mini Tower, 2 x USB 3.0 Type-A, Edge-to-Edge Acrylic Transparent Side Panel, Unique Patterned Front & Top Dust Filter, Modular I/O Panel, Vertical or Horizontal PositioningThe MasterBoxQ300L is your straightforward option in the lineup of the brand new MasterBox Q series from Cooler Master. A series that might be small in size but excels in functionality and modularity without compromising on the thermal performance. Although the size wouldnt tell, the MasterBox Q300L supports a standard ATX PSU which we dont see often in the market with this size. Based on the different system setup, the I O panel can be adjusted to
The MasterBoxQ300L is your straightforward option in the lineup of the brand new MasterBox Q-series from Cooler Master. A series that might be small in size but excels in functionality and modularity without compromising on the thermal performance.Although the size wouldn’t tell, the MasterBox Q300L supports a standard ATX PSU which we don’t see often in the market with this size. Based on the different system setup, the I/O panel can be adjusted to six different locations, three options at each side of the case. You can decide which setup fits your system best.
Due to the cube design of the frame and special pattern design on the magnetic dust filter will make the chassis stand out from the rest. The combination of a practical design and the unique customizable outlook makes the MasterBox Q300L the perfect choice for office and home usage.
Features
- High Flexibility for System Building: 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.
- Minimized Dimension with ATX PSU Support: Despite the Micro-ATX form factor and the body depth and height of only 370mm x 370mm, the MasterBoxQ300L can accommodate a normal ATX PSU.
- Patterned Dust Filter: Special pattern on the dust filter creates a unique outlook for the chassis.
- 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.
- Edge-to-Edge Acrylic Transparent Side Panel: Show off your build through the full size transparent side panel.
- Vertical and Horizontal Position: The case can be put in vertical and horizontal position.
Model
MasterBox Q300L
MCB-Q300L-KANN-S00
Colour
Black
Materials
Steel
Plastic
Dimensions ( L x W x H )
387 x 230 x 378 mm
Motherboard Support
Micro ATX
Mini-ITX
Expansion Slots
4
Drive Bays
5.25": 0
3.5" HDD: 1
2.5" SSD: 2
I/O Port
2 x USB 3.0
Audio In / Out
Pre-Installed Fans
Front: N/A
Rear: 1 x 120mm
Fan Support
Front: 2 x 120/140mm
Top: 2 x 120mm
Rear: 1 x 120mm
Bottom: 1 x 120mm
Radiator Support
Front: 1 x 120/240mm
Rear: 1 x 120mm
Clearances
CPU Cooler: 157mm
PSU: 160mm
GPU: 360mm
Cable Routing
Behind MB Tray: 28mm
Power Supply Support
Bottom mount
ATX PS2
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 809 reviews
Sort
Product Reviews
★★★★★ 5
Best of the facial wipes
Scent: Unscented, Size: 25 Count (Pack of 3)
I have used a lot of facial wipes. But, because of environmental reasons I am trying to cut back on the excess use of wipes which will go into a landfill. However, there are times when I am just too tired or too lazy to do a whole cleansing routine at night and I will reach for a wipe. These do a good job of taking off even waterproof makeup and yet still being gentle on the skin. I find I have no sensitivity to them(and I am sensitive to many, many things). I bought them specifically this time for my trip to Thailand because I knew it would be hot and humid and that I probably would need to cleanse my face a couple of times during the day from sweat and grime. They worked and I found them refreshing. I think I will always keep them on hand for the times I need them — this is by far my favorite brand.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 22, 2022
★★★★★ 5
Great for Rosacea Skincare
Scent: Unscented, Size: 25 Count (Pack of 6)
My elderly mom has rosacea and these moist Micellar Facial Wipes are the absolute best for cleaning her delicate skin. I was so happy to discover Simple Facial Wipes because I had tried many other brands in the past, but all of the other wipes irritated her face and caused a burning sensation. These wipes are soft, sturdy and unscented. They are also pricier than other brands, but they are well worth the cost.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 29, 2025
★★★★★ 5
Best wipes at a great price!
Scent: Unscented, Size: 25 Count (Pack of 6)
These are about the best facial cleansing wipes I've found anywhere, and if you buy the bundle it's a great bargain as well. The wipes are gentle on my sensitive skin, but do a thorough job of getting off the makeup, even mascara and eyeliner. My husband was shaking an ink cartridge the other day and black ink sprayed out all over his face and shirt. On impulse we grabbed one of my facial wipes and started to clean the ink off his face. It easily cleaned up all of the ink, even from his mustache and beard with no residue, and I only had to use two of them. That's how effective these wipes are!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 23, 2020
★★★★★ 5
Fun solid ball
Style: Recharges, Size: Medium, Style: Recharges, Size: Medium
Great squeaky balls! Glow doesn’t last for a long time, but they go far in the Chuck it. Solid ball, my dog doesn’t seem to destroy them.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 11, 2026
★★★★★ 5
Great ball!
Style: Recharges, Size: Medium
The dog loves chasing it! Walks around sqeeking it all the time. And bonus, I can see it in the middle of the floor when I get up in the middle of the night so I won't unknowing step on it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 5, 2026
recommand products
Confrontation With the Lord of the Mountain, Stark (DZ-BT13/EX06EN) [Parallactic Clash]
12.00
Tome Of Pandemonium (Yellow) (Extended Art) [PEN277] (Compendium of Rathe) Rainbow Foil
59.95
Arcane Signet (2538) [Secret Lair Drop Series]
24.00
Elementaria Sanctitude (TDR) (DZ-SS12/019EN) [Master Deckset -Erika Myojo-]
130.95
Emeritus of Ideation (Serial Numbered) [Secrets of Strixhaven]
4028.50