The back with red interior HPRC Divider Kit System for HPRC 2550W Series Hard Resin Cases (High-Performance Resin Cases) is designed to fit an HPRC 2550W series hard resin case. It has foam covering the interior walls and bottom. It also has 2 soft bags, 1 customizable divider and egg crate foam for the lid. Divider Kit Basics • Fits HPRC2550W series hard resin cases • Foam covering interior walls and bottom • Two soft bags • One self-customizable polyester plastic divider using touch fasteners • Egg crate foam for the lid