The Conterra Trauma insert fits Pelican Cases #1550 or larger cases, or Nanuk 940 or larger cases. Built with the same legendary quality that Conterra puts in all of their products, the Trauma Insert sports multiple pockets and hinged organization platforms. It attaches to the inside top of your case (you supply the case) with adhesive back hook and loop (we supply). The insert accepts multiple combinations of the Conterra MOS compatible organizers, allowing you to customize your box for trauma, Meds, etc. The Pelican/Nanuk Lid insert hinges down so that both sides can be utilized.