2" Square Receiver Tube Opening.Rated up to 4,000 lbs. (GTW) Weight Carrying (WC). Solid All-Welded Construction for Maximum Strength and Safety. Fits: 2009 - 2012 Infiniti, FX35, All Styles. 2009 - 2013 Infiniti, FX50, All Styles. 2013 Infiniti, FX37, All Styles.