Combination Tandem Axle Hanger Kits less U-Bolts and Springs - 4 1/4" Front Hanger with 9/16" Bolt Hole, 3 1/2" Center Hanger with 7/8" Bolt Hole, & 5 3/8" Rear Hanger with 5/16" Bolt Hole - 13-4HD Equalizer 5/16" & 9/16" Bolts and Nuts - 7/8" Wet Bolt with Lock Nut