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 Positioning
SKU: 67323436296

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 Positioning

Sale price$55.58 Regular price$61.75
Save 10%

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 7 - Jul 12

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:
  1. 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
SKU: 67323436296

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.1 ★★★★★
Based on 2164 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
A
Verified Purchase
Ann H. Chappell
Draper, US
★★★★★ 5
Bought more
Scent: Gray
Nice to have a scrub side and a soft side. Easily toss on washing machine to clean. Seems to last. Nice size and loop to easily hang to dry.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 20, 2024
V
Verified Purchase
Victoria J. Dulaney
Cuba, US
★★★★★ 3
Small Wash Cloth - Potholder Size
I really want to rave about the product, but it is just too small. The wash cloth lather's really well (it will save on liquid soap). I love the exfoliating side, I feel I am getting clean. I am a female who loves to work outside in the garden, ride ATV's and do woodworking. I get really dirty and it is great for removing dirt! My husband loves the cloth too, but he is tall (6'2") and the cloth is really small for him. For Him, my solution was to sew two of them together (don't judge my sewing skills). He can now use it as a wash cloth and back scratcher/cleaner (loops sewn at opposing ends). Pros: Cleans well, lots of lather with little soap, has a hanging hoop. Cons: Extremely Small (that is a regular size white Bed and Bath wash cloth for comparison). If using the terry cloth side, hard to hold because synthetic scrubby side is slick, the terry side also tends to "ball up" (I don't think this can be fixed because of the nature of the synthetic side). Please make this product larger, I would definitely buy again. Thank You!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 13, 2022
R
Verified Purchase
Ryan
New York, US
★★★★★ 5
Scrub a dub dub
Scent: Ivory
I like the scrubby side more then the soft side, fits great in the hand, washing doesn’t ruin the durability or feel and the pack is a great deal!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 3, 2025
M
Verified Purchase
Ma
Boise, US
★★★★★ 5
Perfect introduction
Format: Library Binding
She loves identifying and finding the dog
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 31, 2022
R
Verified Purchase
Renegade Rebel
Draper, US
★★★★★ 5
Made in America nano-hydroxyapatite Toothpaste that's Well Worth Buying.
I've been using the Japanese brand Apagard Premio toothpaste for a couple of years now and now I've tried this Boka toothpaste while looking for alternatives that wold be less costly. Boka Toothpaste is very mild and makes brushing your teeth better. It doesn't have that harsh mint flavor which with most toothpastes feels like it's burning your mouth. It comes in multiple flavors and when you're done brushing your teeth, there is no need to rinse your mouth as it is a safe toothpaste to use. After using it for a few days, I feel that I will keep using the Boka brand from now on. I just wish that most stores would carry this toothpaste instead pf selling all those major brands which are full of fluoride. Did a bit of research and found that Boka Toothpaste has the same percentage of nano-hydroxyapatite as Apagard premio which is 10%. So that means that Boka Toothpaste is just as good if not better. No Fluoride No Harsh burning Mint Flavor Safe to shallow Multiple flavors 10% nano-hydroxyapatite Keeps your teeth Strong And one thing I've noticed is nano-hydroxyapatite makes your teeth less sensitive by rebuilding your tooth enamel I ordered four flavors, Watermelon Mint, Strawberry Mango, Orange Cream and Coco Ginger. So far, I've tried the Coco Ginger and I was surprised at how mild it was and it didn't have the sharp taste that ginger usually has. It is good and I enjoy it. I'm looking forward to trying the other flavors. The Orange Cream I'm sure my wife will like if I can get her to try it. But she can be very stubborn at times. I see there are some other flavors which I intend to try such as the Cinnamint, Cucumber Dill, Lemon Lavender and Strawberry Basil. Not sure if I should try the Ela Mint as I don't know how strong or mild the mint will be. I'm sure that if places such as Walmart brick & mortar stores sold this toothpaste, that it would sell really well.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2025

recommand products