This unit is BEAND NEW:Never opened or registered. I just bought it recently but decided to go with the 6U. Too many Modules to fit in a single 3U, the 6U is going to pushing it. I d like being limited but if your new to Eurorack(Modular) systems or have a Minibrute-MB2S. This case has so much to offer!!! Here. A transcript courtesy of Gemini!!!

The Arturia RackBrute 3U is a sturdy, portable Eurorack modular case that houses up to 83 HP of modules (88 HP total, minus the 5 HP power supply). It features an integrated, noise-filtered power supply (1600mA on ±12V, 900mA on +5V) and Arturia's "Link" system, allowing it to connect with other RackBrute cases or compatible synthesizers for easy, cable-friendly transport.

Key FeaturesRugged Construction: Built with a durable aluminum chassis and wood side panels, protecting your modular gear during transit. [1, 2]

• Configurable Positioning: The included handle and smart fastening system allow you to set your modules flat, at an angle, or fold them together with another unit like a clamshell.
• Integrated Power: The built-in bus board features 20 slots to power up to 20 individual modules, complete with sophisticated noise filtering to keep audio signals clean. 
• Total HP: Offers 88 HP of total width, leaving exactly 83 HP of usable space once the power module is accounted for. 

Who is it for?It is highly recommended for beginners expanding from semi-modular synths (like the Arturia MiniBrute 2/2S) as well as experienced users who need a compact, travel-friendly sidecar for live performances.