# What's in the Box (Pre-production version)

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These pages for REFERENCE, skip to the [Mechanical assembly guide](../hardware/mr-b3rb-mechanical-assembly-guide) for actual assembly
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The MR-B3RB is a "kit of kits", therefore, components are grouped to sub-pages relating to their sub-kits.&#x20;

These sub-pages will describe the individual sub-kit. Each page contains a components table which enumerates all the parts that are included in the kit.



The diagrams on the pages contain the pictures of the parts.&#x20;

The parts are labelled with their corresponding serial numbers, either directly in the diagram or in the heading of the diagram.\
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To understand the possible configurations please refer to the[ Naming and Versions page](b3rb-naming-and-versions).
