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- Back to the OfficeFeed updated 2026-11-09£70.99Delivery £0.00Visit shop ↗
Compact 21.3L mATX case with broad compatibility.. Supports M-ATX / Mini-ITX, 358mm 4-slot GPUs, and 140mm ATX PSUs.. Supports up to 360mm radiators with SFX PSU, or 240mm with ATX PSU.. Up to 168mm CPU cooler clearance, or 162mm with side fan bracket.. Includes 2 pre-installed 120 × 120 × 15mm slim top fans.. Supports up to 9 fans across top, side, bottom, rear, and front.. Removable top bracket simplifies CPU 8-pin routing and fan setup.. Removable front bracket allows easier large GPU installation.. Supports both horizontal and vertical layouts.. Optional Vertical AeroDeck adds up to 3 × 120mm or 2 × 140mm fans for GPU cooling.. Build like never B4. Co-developed with DAN Cases, the B4-mAT