The KAC Keymod Flat Panel Kit includes a set of seven 5.5" polymer rail panels. Each textured panel snaps securely to any bare section of Keymod equipped rail, providing a more positive gripping surface and also insulating the support hand from barrel heat. While designed for the URX 4 rail, these panels will also fit any other rifle handguard that has a Keymod interface. Mfg: Knights Armament SPECS: Fits - Standard Keymod handguards. Panel Length - 5.5". Material - Polymer. Quantity - 7 panels. Color - Black or Flat Dark Earth.