We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Compact white wood panelled mATX case with steel frame, horizontal or vertical orientation

Lian Li

Lian Li B4 mATX 21.3L PC Case White Wood

SKU CH-ZJB2-QGR8P

Compact 21.3 L mATX chassis supporting 358 mm GPUs, 360 mm AIOs and dual PSU formats with wood front panel and pre-installed 120 mm fans

  • Max graphics card length358.9MM
  • Housing materialSteel 4.0 mm / Wood
  • Power supply mountingTop and Bottom
  • Supported motherboard sizesMicro-ATX
  • Dust filteringBottom: Magnetic filter x 1
  • 3.5-inch internal bays1

Model White Wood Panel

  • Fits mATX boards and 358 mm GPUs in a 21.3 L frame
  • Two slim 120 mm fans pre-installed for instant airflow
  • Switch between horizontal desktop and vertical tower orientation
  • Wood front panel adds a natural accent to the white steel body
  • Rotatable AC inlet and rear clearance simplify cable routing in both layouts

Compact mATX Chassis for Versatile Builds

The Lian Li B4 mATX is a 21.3-litre small form factor case designed for Micro-ATX motherboards. It accommodates graphics cards up to 358.9mm long and CPU coolers up to 166.5mm tall. The chassis supports both ATX and SFX power supplies with a maximum length of 140mm. Its dual-orientation design allows horizontal desktop or vertical tower placement to suit different workspace layouts.

Thermal Performance and Acoustic Profile

Two slim 120mm fans come pre-installed at the top to establish baseline airflow. The case offers extensive mounting points including side radiator support up to 360mm with an SFX power supply. Additional fan locations exist on the side, front, bottom and rear for 120mm or 140mm configurations depending on the PSU choice. A magnetic dust filter on the bottom simplifies maintenance without restricting intake.

Bundled Components and Practical Benefits

The pre-installed 120mm fans provide immediate cooling without separate purchase or installation effort. A rotatable AC inlet eases cable routing in either orientation while generous rear clearance keeps wiring tidy. Front panel connectivity includes USB 3.2 Type-C, two USB 3.0 Type-A ports and an audio jack for convenient peripheral access. Real wood side panels in white beech deliver a distinct aesthetic that suits both gaming and lifestyle environments.

How it compares

Measured against everything we stock in Tower & Desktop PC Cases, at today’s prices. Recalculated every night.

Price $71.99
Cheaper than about 71% of the 1,468 comparable items (median $100.99).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameLIAN LI
Product lineB4
Model nameB4 W-WD
Product typeATX / Micro ATX Mid Tower
Product colorWhite
Storage
3.5-inch internal bays1
2.5-inch internal bays1
Ports & slots
Expansion card slots4
Front panel portsUSB 3.0 Type A x 2, Power Button x 1, Audio x 1, USB 3.2 Type C x 1
Size & build
Max graphics card length358.9MM
Housing materialSteel 4.0 mm / Wood
Power supply mountingTop and Bottom
Dust filteringBottom: Magnetic filter x 1
Fan mounting optionsTop: 120 mm x 2 (Pre-installed)
Side (With SFX PSU) 120 mm x 3 / 140 mm x 2
Side (With ATX PSU): 120 mm x 2 / 140 mm x 2
Front (With SFX PSU ONLY): 120 mm x 1
Bottom: 120 mm x 3 / 140 mm x 2
Rear: 120 mm x 1
Product dimensions47.6 × 26.6 × 36.3CM
Compatibility
Supported motherboard sizesMicro-ATX
Radiator supportSide - Up to 360 mm
CPU cooler height limit166.5MM
PSU length limit140 mm
More details
120mm fan count2

Other versions of this model

2 more in the same range

Questions about this item

Will a 358 mm graphics card fit with the pre-installed top fans in place?

Yes, the case allows up to 358.9 mm GPU length and the two 120 mm top fans are already installed, so no extra clearance calculation is needed.

Can I install a 360 mm radiator on the side if I use an ATX power supply?

A 360 mm side radiator is supported only with an SFX power supply; with an ATX PSU the side fan mounts change to two 120 mm or two 140 mm positions, so a 360 mm radiator will not fit.

What drive bays are available for adding storage later?

There is one internal 3.5 inch bay and one internal 2.5 inch bay, both accessible behind the motherboard tray for easy cable routing.

More in Tower & Desktop PC Cases

Similar items