This oversize load mirror bracket set is for the Peterbilt 379-  (This will fit any truck with the mirror brackets that have the same configuration as seen in the picture).  The mirror brackets are billet aluminum.  With each set you receive a drivers side bracket, a passenger side bracket and 25" extension bars.  (mirrors are optional) - Mirrors can be purchased for an addtional $30 per pair.  We also have 36" extension bars which can be purchased for an additional $40 per pair.