The ASUS A21 micro-ATX case offers support for 360 mm radiators, and 380 mm graphics card, and clean cable management.
 
BroadCompatibility: A21 supports up to 360 mm radiators, graphics cards up to 380 mm in length and CPU air coolers up to 165 mm in height.
Capable Cooling: The front-panel mesh is 40% porous to maximize the balance of airflow, dust filtering and RGB visibility.
Ample cable management: The A21 provides a compartment behind the motherboard that is 33 mm wide to keep your wiring tucked away and tidy.

Discover Hidden Potential
The ASUS A21 is a PC case crafted for minimalist mainstream DIY PC builders, with support for a variety of AIO coolers and graphics cards, and plenty of airflow potential to keep things running smoothly.

Broad Compatibility
Despite being a micro-ATX case, the A21 still supports up to 360 mm radiators, graphics cards up to 380 mm in length and CPU air coolers up to 165 mm in height, giving builders plenty of options to assemble their next PC.

Capable Cooling
The front-panel mesh of the A21 is 40% porous to maximize the balance of airflow and RGB visibility. Users can add up to three 120 mm fans to this section of their build to solidly manage system temperatures.

Ample Cable Management
The A21 provides a compartment behind the motherboard that is 33 mm wide to help you keep your wiring tucked away and tidy.

Colour-Coordinated Builds
The A21 come with colour-coordinated internal I/O cables to compliment your build theme.
 
Specification

Form Factor
Micro ATX
Power Supply Wattage
No PSU
Motherboard Support
Micro ATX, Mini ITX
Connectors / Controls
2 x USB 3.2 Gen1
1 x Headphone
1 x Microphone
Drive Bays
1 x 2.5″” Bay
2 x 2.5″”/3.5″” Combo Bay
Expansion Slots
5 Expansion Slots
Cooling System
Included:
None

Fan Mounts:
Front: 3 x 120 / 2 x 140 mm
Top: 3 x 120 / 2 x 140 mm
Rear: 1 x 120 mm

Radiator Support:
Front: Up to 360 mm
Top: Up to 360 mm
Rear: 120 mm
Colour
Black
Compatability
GPU max length:
380 mm

CPU cooler max height:
165 mm

PSU max length:
210 mm
Weight/Dimensions
7.3 kg
220 x 430 x 465 mm
Additional Features
See Overview
Package Weight
8.7000 kg
Warranty
2 Years
Full Box Quantity
1