Lian Li B4 Wood M-ATX Mini Tower Case – Compact 21.3L SFF with Wood Accent

The Lian Li B4 Wood M-ATX Mini Tower Case (SKU: G99-B4X-WD-IN) is a compact small-form-factor chassis co-developed with Daniel Hansen of DAN Cases, bringing together precise engineering and a distinctive wood-and-steel aesthetic. At just 21.3 litres, the B4-mATX punches well above its size class, fitting full-featured builds without the bulk of a traditional mid-tower. Despite its compact 420 × 191 × 288 mm (D × W × H) footprint, the case accommodates Micro-ATX and Mini-ITX motherboards, graphics cards up to 358 mm long and 4 slots thick, and ATX power supplies up to 140 mm in length or the more compact SFX format. A dedicated pre-installed GPU anti-sag bracket supports cards up to 4 slots thick, keeping heavy GPUs seated securely over time. Cooling headroom is a standout feature. With an SFX PSU installed, the side panel supports a 360 mm or 280 mm radiator (up to 52 mm total thickness including fans). An ATX PSU limits side radiator support to 240 mm. CPU tower coolers fit up to 168 mm tall without the side fan bracket and up to 162 mm with it installed. Two 120 × 120 × 15 mm slim fans come pre-installed on the top panel, daisy-chained to reduce cable clutter, and spin up to 1,800 RPM. Total fan support extends to nine positions across the top, side, bottom, rear, and front. Smart modular touches ease the build process: a removable top fan bracket clears the path for routing the CPU 8-pin EPS cable; a removable front bracket lets oversized GPUs slide in from the front of the chassis rather than the side. The rotatable AC inlet handles both horizontal desktop and vertical upright placements. Tool-less removable panels and a removable bottom dust filter round out the accessibility story. Connectivity is handled through a front I/O panel featuring USB 3.0 Type-A, a USB 3.2 Gen 2 Type-C port (up to 20 Gbps transfer speeds), a 3.5 mm audio combo jack, and a power button. — Verified Specifications — Form factor: Micro-ATX / Mini-ITX | Volume: 21.3 L | Dimensions (D×W×H): 420 × 191 × 288 mm | Material: Steel + Wood panel | Colour: Black | Max GPU length: 358 mm (4-slot) | Max ATX PSU length: 140 mm; SFX PSU supported | CPU cooler clearance: 168 mm (162 mm with side fan bracket) | Radiator support: 360 / 280 mm (SFX PSU); 240 mm (ATX PSU) | Pre-installed fans: 2 × 120 × 120 × 15 mm slim (top, up to 1,800 RPM, daisy-chained) | Max fan count: 9 | Storage: 1 × 2.5" SSD (front) + 1 × 3.5" HDD or 1 × 2.5" SSD (bottom) | Expansion slots: 4 | Dust filter: Bottom | Front I/O: USB 3.0 Type-A, USB 3.2 Gen 2 Type-C (20 Gbps), audio, power button | Warranty: 1 year