In Starfire, the "Base" is a ship-like unit that has station-keeping drives that enable it to hold position within a star system. These drives take very little space, so a base typically has more internal hull spaces available for weapons and defenses than an equivalent-sized ship. Since bases can hold position they are most often used to defend warp points and other fixed position locations within a star system.
This miniature is a representation of a size "0" base (abbreviated BS0). It is about the same size as an Escort (ES) or Corvette (CT) sized ship. The BS0 is most often used as an inner system checkpoint and communications relay at warp points, or for customs, policing checkpoints, or watchdogs around the empire. The BS0 could only ever mount a few weapons even if it didn't have other systems installed, so it is often built as an unarmed platform.
Starfire miniatures are "squadron scale" (0.5"-5") miniatures designed for the Starfire Quick Start Rules for miniatures. You can downloads the rules from Wargame Vault at
http://www.wargamevault.com/product/214246/Quick-Start-Rules-for-Miniatures
Starfire products can be found at
http://www.wargamevault.com/browse/pub/9056/Starfire-Design-Studio and
http://www.starfiredesign.com/starfire