Aluminum Skin over sturdy steel frame. Insulated and quiet. This trailer is in very good condition! It has not been in any accidents. There is a minor repair that the left escape door needs which I have shown in the photo. The floor boards are in very good shape as you can see in the picture. The trailer was cleaned out after every use. There is a little rust on the hinges of the top doors which is typical for a trailer kept outside. Trailer was washed inside and out two months ago. Needs to be washed with special trailer wash soap which will get rid of the streaks. These streaks are typical on white aluminum skin trailers. INTERIOR FEATURES-Full size carpeted dressing room with bridle, saddle and blanket racks. Dressing room has four windows, a pop-up roof vent and lighting. Full size spare mounted inside dressing room. The horse compartment features two straight load stalls with padded butt and breast bars, mid-line padding, and rubber floor mats. The pressure treated floor boards are in great shape. The majority of the time I only trailered one horse. There is a removable head divider and tie rings for hay nets and horse. Two escape doors with sliding windows. Large bus styled windows alongside the horses with additional sliding windows in the top rear doors. Pop-up vent for each horse. Interior lights and rear loading light for loading in the dark. Fiberglass roof for good ventilation and lightness. Interior is white with gray padding. Rear loading ramp. There are a few spots where the non-slip material has come off which you can see in the photo. EXTERIOR FEATURES-White aluminum skin with black graphics. Diamond plate stone guard on nose of trailer. Diamond plate running boards. Aluminum wheel wells. I have purchased new hubcaps. Mechanical features include rubber torsion axles for a smooth ride, breakaway battery with continuous charge, wiring is for a six pin tow vehicle receptacle, four wheel electric brakes. Tow chains. I am including a Class 4 adjustable hitch with 2 & 5/16 ball. I did not need sway bars with this trailer since my tow vehicle was a full sized pickup truck. The trailer holds the road beautifully! MEASUREMENTS- Overall length is 14 feet. Height is 7 feet 6 inches. Width is 6 feet. Dressing room is 4 feet. Horse area is 7 feet long measured from breast bar to butt bar. Headroom is 3 feet so total of 10 feet for the horses. Weight is 3,500 lbs.