---
product_id: 142691402
title: "Cooler Master MasterBox NR400 - mATX Mini Tower Case with Tempered Glass Side Panel, 2 x 120mm Pre-Installed Fans, Flexible Air Flow Configurations, Cable Management"
brand: "cooler master"
price: "FREE"
currency: GBP
in_stock: false
url: https://www.desertcart.co.uk/products/142691402-cooler-master-masterbox-nr400-matx-mini-tower-case-with-tempered
store_origin: GB
region: United Kingdom
---

# 2 x 120mm fans Optimized airflow Tempered glass panel Cooler Master MasterBox NR400 - mATX Mini Tower Case with Tempered Glass Side Panel, 2 x 120mm Pre-Installed Fans, Flexible Air Flow Configurations, Cable Management

**Brand:** cooler master
**Price:** FREE
**Availability:** ❌ Out of Stock

## Summary

> 🏆 Build to Impress: Where Function Meets Style!

## Quick Answers

- **What is this?** Cooler Master MasterBox NR400 - mATX Mini Tower Case with Tempered Glass Side Panel, 2 x 120mm Pre-Installed Fans, Flexible Air Flow Configurations, Cable Management by cooler master
- **How much does it cost?** FREE with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/142691402-cooler-master-masterbox-nr400-matx-mini-tower-case-with-tempered)

## 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

- • **Cooling Powerhouse:** Maximize performance with flexible fan and radiator support for ultimate cooling.
- • **Showcase Your Build:** Display your components through a stunning tempered glass side panel.
- • **Minimalist Aesthetic:** Elevate your setup with a sleek design that complements any workspace.
- • **Versatile Compatibility:** Accommodates various motherboard sizes and powerful components.
- • **Effortless Cable Management:** Keep your internals tidy with smart routing and ample clearance.

## Overview

The Cooler Master MasterBox NR400 is a compact mATX mini tower case designed for optimal airflow and cooling performance. It features a tempered glass side panel for showcasing your build, supports multiple fan configurations, and offers smart cable management solutions, making it an ideal choice for both aesthetics and functionality.

## Description

Cooler Master MasterBox NR400 - mATX Mini Tower Case with Tempered Glass Side Panel, 2 x 120mm Pre-Installed Fans, Flexible Air Flow Configurations, Cable Management : desertcart.co.uk: PC & Video Games

## Features

- MINIMALIST DESIGN, OPTIMIZED PERFORMANCE - The NR400 features full mesh front & top panels to optimise internal air flow and cooling performance - the top panel includes a magnetic dust filter (and a fixed filter in the bottom panel)
- TEMPERED GLASS SIDE PANEL - System builds can be showcased through a flush tempered glass panel, which fastens discreetly via the back panel to ensure a smooth surface along the side of the chassis
- EXCELLENT FAN AND RADIATOR SUPPORT - Two 120mm fans come preinstalled in the front and rear panels - the front panel can support either 3 x 120 or 2 x 140mm fans and a radiator up to 280mm, while top supports 2 x 120/140mm fans or a 240mm radiator
- IMPRESSIVE CLEARANCES - Supports both micro-ATX and mini-ITX motherboards, CPU coolers up to 166mm in height, graphics cards up to 346mm in length, and and an ATX PS2 power supply up to 140mm in length (325mm without a front radiator or HDD cage)
- SMART INTERNALS - Cabling can be neatly routed through rubber grommets, while 22mm of clearance space behind the motherboard provides ample room for cable management - the HDD cage can be repositioned for a longer PSU or additional radiator space

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07QP88F8B |
| Antenna Location | Indoor |
| Best Sellers Rank | 247,059 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 2,567 in Computer Cases |
| Box Contents | Computer Case |
| Brand Name | Cooler Master |
| Case Type | Mini-Tower |
| Colour | Black |
| Compatible Devices | Micro-ATX Motherboard |
| Cooling Method | Air |
| Customer Reviews | 4.5 4.5 out of 5 stars (192) |
| Enclosure Material | Tempered Glass |
| Fan Size | 120 Millimetres |
| Global Trade Identification Number | 04719512080276 |
| Hard Disk Form Factor | 2.5 Inches |
| Internal Bays Quantity | 2 |
| Item Dimensions D x W x H | 48D x 48W x 29H centimetres |
| Item Type Name | Micro ATX mini tower case, tempered side glass, 2 x 120 mm pre-installed fans, flexible airflow and wiring management, without optical disc burner |
| Item Weight | 10.43 Grams |
| Light Color | Black |
| Manufacturer | Cooler Master Europe B.V. |
| Manufacturer Part Number | MCB-NR400-KGNN-S00 |
| Model Name | NR400 |
| Model Number | MCB-NR400-KGNN-S00 |
| Number of Fans | 6 |
| Other Special Features of the Product | High air flow |
| Power Supply Mounting Type | Rear Mount |
| Product Warranty | 1 Year |
| Supported Motherboard | Micro ATX |
| Total Expansion Slots Quantity | 4 |
| Total USB 2.0 Ports | 2 |
| Total USB 3.0 Ports | 2 |
| Total USB Ports | 2 |
| Unit Count | 1.0 count |

## Product Details

- **Brand:** Cooler Master
- **Case type:** Mini-Tower
- **Colour:** Black
- **Cooling method:** Air
- **Fan size:** 120 Millimetres
- **Material:** Tempered Glass
- **Model name:** NR400
- **Motherboard compatibility:** Micro ATX
- **Power supply mounting type:** Rear Mount
- **Recommended uses for product:** Indoor

## Images

![Cooler Master MasterBox NR400 - mATX Mini Tower Case with Tempered Glass Side Panel, 2 x 120mm Pre-Installed Fans, Flexible Air Flow Configurations, Cable Management - Image 1](https://m.media-amazon.com/images/I/91Ya+9RPJ0L.jpg)
![Cooler Master MasterBox NR400 - mATX Mini Tower Case with Tempered Glass Side Panel, 2 x 120mm Pre-Installed Fans, Flexible Air Flow Configurations, Cable Management - Image 2](https://m.media-amazon.com/images/I/91P7kyTYp1L.jpg)
![Cooler Master MasterBox NR400 - mATX Mini Tower Case with Tempered Glass Side Panel, 2 x 120mm Pre-Installed Fans, Flexible Air Flow Configurations, Cable Management - Image 3](https://m.media-amazon.com/images/I/91gXEWjsCWL.jpg)
![Cooler Master MasterBox NR400 - mATX Mini Tower Case with Tempered Glass Side Panel, 2 x 120mm Pre-Installed Fans, Flexible Air Flow Configurations, Cable Management - Image 4](https://m.media-amazon.com/images/I/81Mhx5FxgOL.jpg)

## Available Options

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

## Questions & Answers

**Q: Can this case fit a verticle gpu mount bracket?**
A: No. It only comes with 4 PCI slots and most vertical GPU brackets require at least 7 horizontal PCI slots or a vertical PCI slot (which NR400 doesn’t). Bear in mind that vertical mounting near a glass side panel in a compact case will likely generate a lot of heat (and thus slow overall performance).

**Q: Can i fit a rx 5700 xt in this case**
A: Yes, the MasterBox NR400 has a total graphics card clearance of around 350mm.
It supports any length of card currently available, including any model of RX 5700XT currently on the market. 
We hope you will enjoy the case and the building experience.

**Q: does it come with any fans?**
A: Yes, it comes with 2 pre-installed fans: 1 x 120mm front and 1 x 120mm rear fan.

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.co.uk/products/142691402-cooler-master-masterbox-nr400-matx-mini-tower-case-with-tempered](https://www.desertcart.co.uk/products/142691402-cooler-master-masterbox-nr400-matx-mini-tower-case-with-tempered)

---

*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-17*