Trimax TRZ4ALRP 4" Aluminum Adjustable Hitch with Dual Hitch Ball and Receiver Adjustment Pin Weight tested to 10,000 lbs tow weight Weight tested to 1,500 lbs Tongue weight 100 percent Polished solid aluminum Ball mount easily adjusts up and down in 1 inch increments Flip the razor for added rise The 4" range of adjustment is from the Center of Pin Bore to center of Pin Bore. 100 percent polished aluminum Weight tested to 10,000 pounds; 1,500 pounds maximum tongue weight Flip hitch for added rise Easy to install and adjusts in seconds from 0"-4"drop or rise Aluminum ball mount adjusts in 1" increment