---
product_id: 59059636
title: "MasterBox Q300L"
brand: "cooler master"
price: "€ 269.58"
currency: EUR
in_stock: true
reviews_count: 8
category: "Cooler Master"
url: https://www.desertcart.it/products/59059636-masterbox-q300l
store_origin: IT
region: Italy
---

# Supports up to 5 fans or 2 radiators Rotatable I/O panel with 3 orientations Magnetic removable dust filters MasterBox Q300L

**Brand:** cooler master
**Price:** € 269.58
**Availability:** ✅ In Stock

## Summary

> 🖥️ Compact power, limitless style — build your dream rig without compromise!

## Quick Answers

- **What is this?** MasterBox Q300L by cooler master
- **How much does it cost?** € 269.58 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/59059636-masterbox-q300l)

## Best For

- cooler master enthusiasts

## Why This Product

- Trusted cooler master brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless dust defense:** Magnetic dust filters on front and top panels ensure easy cleaning and a sleek, minimalist look.
- • **Spacious compact design:** Fits CPU coolers up to 159mm, GPUs up to 360mm, and PSUs up to 160mm—perfect for powerful builds in a mini-tower.
- • **Customizable airflow mastery:** Maximize cooling with up to two 140mm front fans, dual 120mm top fans, and a rear 120mm fan or radiator.
- • **Showcase your build in style:** Edge-to-edge transparent side panel offers a crystal-clear view of your components with 28mm cable management space.
- • **Flexible orientation, your way:** Rubberized thumbscrews let you position your PC vertically or horizontally without compromising airflow.

## Overview

The MasterBox Q300L is a versatile mini-tower PC case featuring magnetic removable dust filters, flexible vertical or horizontal orientation, and extensive cooling support with up to five fans or liquid cooling radiators. Its edge-to-edge transparent side panel and rotatable I/O panel provide customizable aesthetics and functionality, while spacious interior dimensions accommodate high-performance components and efficient cable management.

## Description

Versatile mini-tower PC case with removable magnetic dust filters, flexible orientation, and multiple cooling options for customizable airflow and clean, modern style.

Review: ✔ Awesome Little Case! (with a Few Small Flaws) - Having had a larger PC case for a while I thought it was time to move to a smaller option. I liked the look of the BitFenix cases but at around the £50 mark, the CoolerMaster Q300L was just what I was looking for price and design-wise. Being able to choose where the USB and power buttons are placed is a cool idea but if you want to use it at the top (like in my setup - Pic above) you will need a USB extension to run the cable down the back of the case. There's plenty of room for cable management and the build quality is good. I have a full sized HDD at the back and there's also space for two SSD's. Having all the holes means that you don't get much airflow pressure but I haven't had any heat issues with my overclocked AMD 1700X. If you're looking at having your PC on the floor, I woudn't choose this case as it'll most likely be full of dust in a few months. For desktop, I've had it running 4 months with minimal dust although you can see a slight dust ring around the front intake fan. When setting up be careful with any fluff and this will easily get stuck into magnet dust filter mesh. If you do decide to buy the CoolerMaster Q300L, you'll also need to invest in some fans as it only comes with one medium-volume fan. LED fans looks great and I've added three plus used the included fan as a front-intake. Pros ✔ Cool Design ✔ Build Quality + Cable Management ✔ Removable Magnet Dust Filters ✔ Compact Size Cons - Only One Fan Included - Perspex Window Tint Is Very Dark - USB Cables a little short I also upgraded the CPU fan to a Arctic Freezer 7 Pro and there's plenty of horizontal room left. If you're going for a big CPU cooler, you might have to watch out with the clearance. Cheers, Jim!
Review: Mastic cooler case - This case is really good. I use PC part picker and I highly recommend it for beginners but this case is very cheap if you can't afford a very expensive case and I had no issues I'm using it my pre-build as a home server to store all my stuff and so far it's been fine with temperature. What's good about this case? It's very small and compact and easy and it's not that heavy and the filters are easy to change.

## Features

- PATTERNED MAGNETIC DUST FILTERS - The custom-designed front and top magnetic dust filters are completely removeable and present a sophisticated, yet cunningly minimalist, functional chassis facade.
- VERTICAL OR HORIZONTAL- The MasterBox case features rubberized thumbscrews that enable either a standing or laying orientation with fully-perforated panels for multiple airflow configurations.
- MULTIPLE COOLING OPTIONS - The front panel can support up to two 140mm fans or a 240mm liquid cooler radiator. The rear panel supports a 120mm cooling module (fan or radiator), while the top can house two 120mm fans.
- EDGE-TO-EDGE DISPLAY - The square edge-to-edge transparent side panel enables a full display of any system build, and includes an I/O panel which can be rotated into 3 different orientations on either side. Behind the motherboard tray is 28mm of allocated space for clean cable management.
- SPACIOUS INTERIOR - The MasterBox Q300L supports CPU coolers up to a height of 159mm, graphics cards (GFX) up to a length of 360mm, and power supplies (PSU) up to 160mm in length.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0785GRMPG |
| Best Sellers Rank | 43,533 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 376 in Computer Cases |
| Guaranteed software updates until | unknown |
| Item model number | MCB-Q300L-KANN-S00 |
| Manufacturer | Cooler Master Europe B.V. |
| Product Dimensions | 39.08 x 23 x 38.1 cm; 480 g |

## Product Details

- **Brand:** Cooler Master
- **Case type:** Mini-Tower
- **Colour:** Black
- **Cooling method:** Fan
- **Fan size:** 144 Millimetres
- **Material:** Alloy Steel, Plastic
- **Model name:** Q300L
- **Motherboard compatibility:** Mini ITX, Mini ATX
- **Power supply mounting type:** Top Mount
- **Recommended uses for product:** Gaming, General Computing

## Images

![MasterBox Q300L - Image 1](https://m.media-amazon.com/images/I/81I9Ef0fOIL.jpg)
![MasterBox Q300L - Image 2](https://m.media-amazon.com/images/I/81Aav04jy-L.jpg)
![MasterBox Q300L - Image 3](https://m.media-amazon.com/images/I/71wyMgMu4HL.jpg)
![MasterBox Q300L - Image 4](https://m.media-amazon.com/images/I/81BErL5zPfL.jpg)
![MasterBox Q300L - Image 5](https://m.media-amazon.com/images/I/81oJUsKMIsL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Does this case have USB 3 on the front io ports ?**
A: Yeah it has 2 USB 3 ports, An audio input and output jack and a reboot button (obviously an on/off button as well haha)

**Q: Would the Corsair Hydro H100 x 240 fit in this case??**
A: Yes it does, I have fitted my Corsair Hydro H100i Platinum RGB on the top. There is plenty of room. You should have zero stress putting an AIO in there.

**Q: What size are the fans?**
A: It has 3 fans, not one like the other person said. The description and images clearly say it has one at rhe rear and two on thw front panel. They are all 120mm

**Q: Does the case have room to comfortable mount a 3.5" HDD?**
A: yes there is, in the back if you attach the included rubber feet then it is easy to attach a HDD and there is also room for 2 2.5mm HDD or SSD

## Customer Reviews

### ⭐⭐⭐⭐⭐ ✔ Awesome Little Case! (with a Few Small Flaws)
*by J***M on 3 October 2018*

Having had a larger PC case for a while I thought it was time to move to a smaller option. I liked the look of the BitFenix cases but at around the £50 mark, the CoolerMaster Q300L was just what I was looking for price and design-wise. Being able to choose where the USB and power buttons are placed is a cool idea but if you want to use it at the top (like in my setup - Pic above) you will need a USB extension to run the cable down the back of the case. There's plenty of room for cable management and the build quality is good. I have a full sized HDD at the back and there's also space for two SSD's. Having all the holes means that you don't get much airflow pressure but I haven't had any heat issues with my overclocked AMD 1700X. If you're looking at having your PC on the floor, I woudn't choose this case as it'll most likely be full of dust in a few months. For desktop, I've had it running 4 months with minimal dust although you can see a slight dust ring around the front intake fan. When setting up be careful with any fluff and this will easily get stuck into magnet dust filter mesh. If you do decide to buy the CoolerMaster Q300L, you'll also need to invest in some fans as it only comes with one medium-volume fan. LED fans looks great and I've added three plus used the included fan as a front-intake. Pros ✔ Cool Design ✔ Build Quality + Cable Management ✔ Removable Magnet Dust Filters ✔ Compact Size Cons - Only One Fan Included - Perspex Window Tint Is Very Dark - USB Cables a little short I also upgraded the CPU fan to a Arctic Freezer 7 Pro and there's plenty of horizontal room left. If you're going for a big CPU cooler, you might have to watch out with the clearance. Cheers, Jim!

### ⭐⭐⭐⭐⭐ Mastic cooler case
*by T***S on 5 March 2025*

This case is really good. I use PC part picker and I highly recommend it for beginners but this case is very cheap if you can't afford a very expensive case and I had no issues I'm using it my pre-build as a home server to store all my stuff and so far it's been fine with temperature. What's good about this case? It's very small and compact and easy and it's not that heavy and the filters are easy to change.

### ⭐⭐⭐⭐ Great Value
*by R***D on 12 July 2018*

In terms of features this case was very competitive at this price point, overall I'm impressed with the build quality and features. There aren't many good matx cases at this moment in time and the ones that do exist seem to be budget or really expensive. Pros - Nice aesthetic on dust filter. Loads of room for cable management (Even with non-modular psu's) Can position the front Io wherever you want. Very compact but plenty of building space. Good build quality. Fairly cheap. Fits very large graphics cards. Cons - Slightly scratched on inside acrylic panel. Difficult to get acrylic panel off. Could be more mounting points for ssd's/slim hdd's. Overall an excellent case for the price, looks very modern and a pleasure to build in.

## Frequently Bought Together

- Cooler Master MasterBox Q300L Micro-ATX Tower with Magnetic Design Dust Filter, Transparent Acrylic Side Panel, Adjustable I/O & Fully Ventilated Airflow, Black (MCB-Q300L-KANN-S00)
- AMD Ryzen 5 5500 6-Core, 12-Thread Unlocked Desktop Processor with Wraith Stealth Cooler
- Thermaltake Smart 500W 80+ White Certified PSU, Continuous Power with 120mm Ultra Quiet Cooling Fan, ATX 12V V2.3/EPS 12V Active PFC Power Supply PS-SPD-0500NPCWUS-W

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-02-20*