For Sale: Cargo Trailers / Kerrick, Mn The Single Axle Usc712sae Cargo Trailer By Us Cargo Has Aluminum Exterior Fenders, Safety Spring Chains On All Doors, Anodized Front Corners, Rear Corners And Rear Header, And Double Rear Doors. Inside The Trailer You Will Find 3/4" Wolmanized Floor And 3/8" Plywood Sidewalls. The Non-powered Roof Vent Allows For Ventilation Throughout The Trailer. The Curbside Door Allows For Easy Access Inside The Trailer. Please Note: Image Shown In A Tandem Axle.