construction all aluminum floor interlocking extruded aluminum flooring exterior double wall extruded aluminum sides exterior skin prepainted aluminum skin air spacing 2 or 3 air gaps with plexiglas tracks heavy duty fenders interior lights 1 interior light inside stock area center gate swinging center gate rear gate rear gate with sliding calf gate side door 2 side access doors with full height cam latch safety lights extra led clearance & marker lights bumper rear rubber bumper spare spare tire and wheel 2' gravel guard