3 Piece Volvo construction set. - Volvo A25G Articulated Hauler Dump Truck model measures 5" long from the from the back of the bed/bucket to the front of the vehicle. From wheel to wheel, the width is 1.5" wide. The upper side of the vehicle (the cab) is made of metal, everything else is made of plastic. The articulations in the arm/bucket and vehicle can move. As you move each articulation the pins (pistons/cylinders) also move accordingly just like on the real thing. The wheels are made of rubber and can roll. - Volvo L60H Wheel Loader model measures 5" long from the from the back of the vehicle to the tip of the bucket at front. From wheel to wheel, the width is 1.5" wide. The upper side of the vehicle (the cab) is made of metal, everything else is made of plastic. The articulations in the arm/bucket and vehicle can move. As you move each articulation the pins (pistons/cylinders) also move accordingly just like on the real thing. The wheels are made of rubber and can roll. - Volvo EC140E Hydraulic Excavator model measures 3" long from the from the back of the track to the front of the tracks. From track to track, the width is 1.75". The upper side of the vehicle (the cab) is made of metal and can rotate about 270 degrees; everything else is made of plastic. The articulations in the arm can move. The first link of the arm measures about 3.5 inches long from pivot point to pivot point. The second link of the arm measures about 1.75 inches from pivot point to pivot point. Both arm links can move. The scoop also has movement. As you move each articulation the pins (pistons/cylinders) also move accordingly just like on the real thing. The tracks are fitted and can roll. These are not toys. They are very small (about 5 inches long each) and fragile, they are made for display purposes.