THIS STAINLESS STEEL SHIFT PLATE COVER, FITS OVER THE EXISTING SHIFT PLATE ON THE FLOOR. IT FITS PETERBILT 379 TRUCKS WITH A EXTENDED HOOD (WILL NOT FIT 380 SERIES TRUCKS) IT HAS 5 3/4 BY 4 7/8 INCH OPENING AND IT IS 2 9/16" FROM THE TOP OF THE COVER TO THE OPENING. IT HAS AN OVERALL LEGNTH OF 20 1/2" AND IT IS 10 1/4" WIDE. IT HAS A 7/16 TALL LIP AND THE STEP DOWN EDGE IS 1" WIDE. PLEASE CHECK THE MEASUREMENTS BEFORE PURCHASING. IT IS A DOUBLE STICK TAPE MOUNT. NEW. EACH.