AA-Racks Universal Full Size Pickup Truck Ladder Rack Side Bar with 30'' Short Cab Extension -Black/ White (X39-SC)Each Bracket Joints connect with Four Six bolts that built upon the X35 bars which Reinforced the bars rather than weakening them. Over Cab. Extension: 30''; Over Cab. Extension width adjustable: 45''~56. 3''. Side Bar Extension: 53. 5''~90''; Fits 5'~8' bed The extension top bars fit all the full size or semi truck beds. Top Bar Extension Min. 51''~ Max. 71'' Product Height: 30. 5'' to the top, 26'' to the top cross bar. The unit has been weight