The Lian Li B4-mATX is a compact 21.3L small form factor case co-developed with DAN Cases, supporting Micro-ATX motherboards and up to 358mm GPUs.
The Lian Li B4-mATX is a compact 21.3L small form factor case co-developed with DAN Cases, supporting Micro-ATX motherboards and up to 358mm GPUs.
in 15 offers
The lowest price for Lian Li B4 DAN Mesh mATX Case Black right now is $115.50 at Newegg, compared across 15 retailers.
The all-time low was $113.30 on 25 Sept 2026 — today's price is 2% above the lowest ever. This is at or near its all-time low — a good time to buy.
Prices last updated 2 Nov 2026.
Lian Li B4 DAN Mesh mATX Case Black
The Lian Li B4-mATX is a compact 21.3L small form factor case co-developed with DAN Cases, supporting Micro-ATX motherboards and up to 358mm GPUs.
The Lian Li B4-mATX is a compact 21.3L small form factor case co-developed with DAN Cases, supporting Micro-ATX motherboards and up to 358mm GPUs.
Last updated at 02/11/2026 04:40:35
Lian Li B4-mATX 21.3L PC Case, 358mm GPU, 360 AIO, 2 Slim Fans, Black Mesh | 2 Pre-Installed 120mm Slim Top Fans, Supports 360mm AIO, 140mm ATX PSU,
Free delivery
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LIAN LI ATX/Micro ATX Mid Tower Black B4 B4X Steel 4.0mm Cases (Computer Cases - ATX Form)
Delivery $213.17
Lian Li B4 Micro ATX Case Mesh Side Panels NO PSU - Black
Delivery between 4–9 Nov $21
Lian Li B4 DAN Mesh mATX Case - Black (PC-B4X)
Lian Li B4-mATX Mesh PC-B4W SFF Dual-Orientation 21.3L Micro-ATX Case - Black
Delivery between Tue – Fri $36.66
Lian Li B4 DAN Mesh mATX Case Black PC B4X - Lian Li Cases
Delivery $24.28
Lian Li B4 DAN Mesh mATX Case Black PC B4X - Lian Li Cases
Delivery $23
Lian Li DAN-B4 21.3L Compact mATX Case (Black)
Delivery between 4–13 Nov $27.66
Lian Li B4 mATX Mesh Case Black (B4X)
Delivery between Tue – Thu $24
Lian Li B4 Micro ATX Case, Mesh Side Panels, NO PSU
Delivery $19
| For Gaming | Yes |
| Brand | LIAN LI |
| Colour | White, Black |
Lian Li B4-mATX 21.3L PC Case, 358mm GPU, 360 AIO, 2 Slim Fans, Black Mesh | 2 Pre-Installed 120mm Slim Top Fans, Supports 360mm AIO, 140mm ATX PSU,
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
LIAN LI ATX/Micro ATX Mid Tower Black B4 B4X Steel 4.0mm Cases (Computer Cases - ATX Form)
Delivery $213.17
Lian Li B4 Micro ATX Case Mesh Side Panels NO PSU - Black
Delivery between 4–9 Nov $21
Lian Li B4 DAN Mesh mATX Case - Black (PC-B4X)
Lian Li B4-mATX Mesh PC-B4W SFF Dual-Orientation 21.3L Micro-ATX Case - Black
Delivery between Tue – Fri $36.66
| For Gaming | Yes |
| Brand | LIAN LI |
| Colour | White, Black |
