B4-mATX 21.3L Compact PC Case - Supports 358mm GPU & 360mm AIO, Black Mesh

Product Overview

The B4-mATX 21.3L PC Case is a high-performance, compact computer chassis designed specifically for enthusiasts building a powerful Micro-ATX system. With its refined 21.3-liter capacity, this case delivers a space-conscious footprint without sacrificing the ability to house high-end gaming components. The striking black mesh exterior ensures optimal airflow, providing a sleek, minimalist aesthetic that complements any professional workstation or high-end gaming battlestation.

Engineered for versatility, this chassis accommodates full-length graphics cards up to 358mm and supports robust thermal solutions, including a 360mm all-in-one liquid cooling radiator. Included in the package are two high-quality slim fans, perfectly positioned to assist with heat dissipation in tight spaces. This case serves as a practical, reliable foundation for users who demand professional cooling performance and component compatibility in a small-form-factor design.

Please note: This product listing refers strictly to the B4-mATX PC case. It does not include a power supply, motherboard, graphics card, liquid cooling hardware, or other internal PC components not explicitly listed. We highly recommend verifying your specific component dimensions and installation requirements against the provided specifications before beginning your assembly.

Key Features

• Space-Efficient 21.3L Design: Maximize your desk real estate with this compact footprint. The clever interior layout provides sufficient room for high-performance builds while maintaining a small-form-factor that fits neatly into any environment.
• Micro-ATX Compatibility: Specifically designed for Micro-ATX motherboards, this chassis provides a balanced middle ground between tiny Mini-ITX cases and cumbersome mid-tower options. Ensure your motherboard form factor matches these specifications for a seamless installation.
• Exceptional GPU Clearance: With support for graphics cards up to 358mm in length, you can house most modern high-end GPUs comfortably. Always check your specific GPU dimensions including power connector clearance before ordering.
• Robust 360mm AIO Cooling Support: Despite its small volume, this case supports a 360mm all-in-one liquid cooling radiator. This feature allows for superior CPU temperature control, essential for gaming or intensive productivity tasks.
• Optimized Airflow with Slim Fans: We include two slim-format fans to ensure balanced airflow across your critical components. These fans are designed to fit perfectly within the chassis without obstructing other hardware.
• Durable Black Mesh Finish: The full mesh exterior is not only visually striking but also provides superior ventilation. The dark, professional look is ideal for builds where performance and thermal management are the top priorities.
• Easy Build Planning: Every measurement—from the 21.3L volume to the 358mm GPU limit—has been calculated to assist builders. Use these specifications to map out your cable management and component placement for an efficient, clean PC build.

Technical Specifications

• Product Category: High-Performance PC Case / Computer Chassis
• Model Designation: B4-mATX
• Internal Volume: 21.3 Liters
• GPU Maximum Length: Up to 358 mm
• Cooling Support: 360 mm AIO Liquid Cooler compatible
• Included Fans: 2 x Slim-format fans (specific performance specs not provided)
• Chassis Material: Steel frame with full-coverage black mesh
• Motherboard Support: Standard Micro-ATX
• UPC Identifier: 840353054011

What's in the Box

• One (1) B4-mATX 21.3L Compact PC Case in Black Mesh
• Two (2) Factory-included slim cooling fans
• Documentation and essential installation hardware components