extruded aluminum slat outside stock area; .040 white aluminum sheets on gooseneck nose and sides two air gaps w/ plexiglas tracks full swing center gate w/ slider and heavy-duty slam latch w/ external release full swing rear gate w/ two air gaps and easy-glide slider w/ handle on rear gate heavy-duty 32" drop partition 2 6000 lbs. rubber torsion axles w/ electric brakes 16' ; 2 6 000 lbs. rubber torsion axles w/ electric brakes 20' ; 2 7 000 lbs. rubber torsion axles w/ electric brakes 24' heavy-duty 32" streetside unload door w/ two air gaps one led dome light with switch on rear frame breakaway switch w/ battery & slip hook safety chains