upgraded aluminum side wall vents/ delete roof vent 16" on center cross members 16" on center roof bows .080 polycore exterior 2000 lb a-frame jack w/ sand foot 60" triple tube extended tongue 2 5/16" coupler 36" side door w/ bar lock 3/4" plywood floors 3/8" plywood walls 2 12vt led dome light therma cool ceiling wire and brace for a/c led lights led dual tail lights 3500 lb drop leaf spring axles w/ e.b. 7 way bargman plug on brake axles ramp door w/flap door hold back http //www.trailer-mart.com/--xinventorydetail?id=14367572