# Lian Li B4-mATX Mesh Mini Tower Black PC Case for Micro ATX and Mini-ITX Motherboards

**URL:** https://aio.lv/en/product--lian-li-g99b4x00--12594044
**Data updated:** 2026-07-27 18:22 (EEST)
**Category:** Computer Cases
**Manufacturer:** lian li
**Manufacturer code:** G99.B4X.00
**EAN:** 4718466023261
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 79.49 €
**Prices and availability valid until:** 2026-08-28 23:59
**Price without VAT (21%):** 65.69 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--lian-li-g99b4x00--12594044

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 12.08.2026 | free |
| Pickup points | 17.08.2026 | 1.79 EUR |
| Courier delivery to door | 17.08.2026 | 4.99 EUR |

## Summary description

Lian Li B4-mATX Mesh Mini Tower Black PC case designed for Micro ATX and Mini-ITX motherboards. Features a mesh design for optimal airflow, support for SFX and ATX power supplies, and flexible cooling options with support for 120mm and 140mm fans. Includes storage bays for 2.5-inch and 3.5-inch drives and convenient front I/O ports including USB Type-C. Ideal for building compact, high-performance desktop computer systems.

## Long description

The Lian Li B4-mATX Mesh Mini Tower Black PC Case is a compact, high-performance chassis designed to support Micro-ATX and Mini-ITX motherboards. Co-developed with DAN Cases, this mini tower combines a space-saving 21.3-liter volume with exceptional hardware compatibility, allowing builders to assemble powerful desktop systems without compromising on thermal performance. Featuring a sleek black finish and a mesh design optimized for airflow, it balances a minimalist aesthetic with versatile configuration options, including support for both horizontal and vertical layouts.
Advantages
This PC case offers remarkable flexibility through its modular design, supporting large 4-slot graphics cards up to 358mm in length alongside an included anti-sag bracket for enhanced stability. Cooling performance is maximized by extensive fan and liquid cooling support, accommodating up to 360mm radiators and multiple fan placements across the top, side, bottom, rear, and front. Cable management is simplified with dedicated routing points, a removable top fan bracket, and a rotatable AC power connector that adapts seamlessly to different system orientations. Additionally, accessible front I/O connectivity featuring a high-speed USB Type-C port ensures convenient peripheral integration for daily workflows.
Suitable for
Building compact gaming desktop systems with high-end graphics cards
Assembling micro-ATX and Mini-ITX workstations for content creation
Desk setups requiring maximized space efficiency through a vertical layout
PC builds focused on optimized airflow and liquid cooling configurations
When it may not be suitable
This mini tower case may not be suitable for users planning to install full-sized ATX motherboards, as it is strictly limited to Micro-ATX and Mini-ITX form factors. Furthermore, builders looking to install extensive multi-drive storage arrays will find limited storage bays, as the chassis accommodates a maximum of one 3.5-inch drive and one 2.5-inch drive.
Key specifications
Mini Tower PC case form factor
Supports Micro-ATX and Mini-ITX motherboards
Compatible with SFX and ATX power supplies
Supports up to 358mm 4-slot graphics cards
Supports up to 360mm liquid cooling radiators
Includes USB Type-C and USB Type-A front ports
Drive bays: 1 x 3.5-inch and 1 x 2.5-inch
Black steel construction with mesh panel design
How to use
Begin your build by removing the tool-less panels to access the interior chassis. Install your chosen Mini-ITX or Micro-ATX motherboard, securing it alongside your CPU and memory components. Mount your power supply, selecting either an SFX or ATX unit depending on your clearance and cooling layout requirements. Install your graphics card, utilizing the pre-installed anti-sag bracket for structural support, and connect your storage drives to the designated bays. Route your cables using the integrated tie points and removable brackets to maintain clean airflow paths before closing the chassis panels and connecting your peripherals to the front I/O ports.
What to consider before purchase
Verify motherboard form factor compatibility with Micro-ATX or Mini-ITX standards
Check power supply dimensions, noting that radiator and GPU clearances vary between SFX and ATX PSUs
Consider your cooling preferences, as radiator thickness and bottom fan clearance depend on the size of your graphics card
Evaluate your storage requirements against the single 3.5-inch and single 2.5-inch drive bay limits
Usage recommendations: Ensure adequate clearance around the mesh panels and maintain clean dust filters periodically to sustain optimal airflow and cooling efficiency for your internal components.

## Specifications

### Other features

| Feature | Value |
|---|---|
| Noise level | 30.3 dB |

### Weight & dimensions

| Feature | Value |
|---|---|
| Height | 288 mm |
| Depth | 420 mm |
| Width | 191 mm |

### Certificates

| Feature | Value |
|---|---|
| Waste Electrical and Electronic Equipment (WEEE) compliance | Yes |

### Technical details

| Feature | Value |
|---|---|
| Warranty period | 1 year(s) |

### Storage

| Feature | Value |
|---|---|
| SSD form factor | 2.5" |
| Supported HDD sizes | 3.5, 2.5 |

### Cooling

| Feature | Value |
|---|---|
| Side radiator sizes supported | 240, 280, 360 |
| Liquid cooling capability | Yes |
| Liquid cooling installed | No |
| Fan speed | 0 - 1800 |
| Maximum airflow | 64.2 cfm |
| Maximum air pressure | 2.4 mmH2O |
| Bottom fans diameters supported | 120, 140 |
| Number of bottom fans supported (max) | 3 |
| Top fans installed | 2x 120 mm |
| Rear fans diameters supported | 120 |
| Number of rear fans supported (max) | 1 |
| Side fans diameters supported | 140, 120 |
| Number of side fans supported (max) | 3 |
| Front fans diameters supported | 120 |
| Number of front fans supported (max) | 1 |

### Ports & interfaces

| Feature | Value |
|---|---|
| Combo headphone/mic port | Yes |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity | 1 |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity | 2 |

### Display

| Feature | Value |
|---|---|
| Built-in display | No |

### Power supply

| Feature | Value |
|---|---|
| Supported power supply form factors | SFX, ATX |
| Power supply included | No |

### Design

| Feature | Value |
|---|---|
| Maximum PSU length | 140 mm |
| Maximum graphics card length | 358 mm |
| Maximum CPU cooler height | 162 mm |
| On/off button | Yes |
| Cable management | Yes |
| Built-in speaker(s) | No |
| Capacity | 21.3 L |
| Anti-dust filter | Yes |
| Illumination | No |
| Suitable for | Gaming |
| Side window | No |
| Number of 2.5" bays | 1 |
| Number of 3.5" bays | 1 |
| Supported motherboard form factors | Mini-ITX, Micro ATX |
| Product colour | Black |
| Material | Steel |
| Type | PC |
| Form factor | Mini Tower |

## FAQ

### How much does the Lian Li B4-mATX Mesh Mini Tower Black PC Case cost, and is it available for purchase?

The price is 79.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 49 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 12.08.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Lian Li B4-mATX Mesh Mini Tower Black PC Case be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All lian li products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized lian li service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: usb 3.2 gen 2 (3.1 gen 2) type-a ports quantity, usb 3.2 gen 2x2 type-c ports quantity, usb 3.2 gen 2 (3.1 gen 2) type-c ports quantity, usb 3.2 gen 1 (3.1 gen 1) type-a ports quantity, usb 2.0 ports quantity, power supply included, number of 3.5" bays, number of 5.25" bays, type, form factor, supported hdd sizes, supported motherboard form factors, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/12594044/68973778_large.webp