From Halopedia, the Halo wiki
The Halo 3 Banshee Action Clix Figure is a small die-cast replica of the Halo 3 Banshee.
This figure is a part of the Halo ActionClix miniatures. It is being sold for $9.99 as of the year 2008, along with the Halo 3 Wraith, Mongoose, and Scarab. This replica is made from die-cast metal and plastic.