All ramps and such are metal without paint, and the concrete is smooth. Small to medium small size. Has a mini ramp that is about 4 ft, and about a 5ft quarter. Has a metal box about 1ft tall, 2ft wide, and 4ft long with rough edges. Has two other fun boxes, and four ramps for starting on to gain speed. There are three or four bolts randomly sticking out of the concrete which will trip you up on a skateboard and might pop tires on a bmx.