The Kubota KX080-4 Excavator 1/18 scale model is made entirely of plastic, yet the proportions and scale are accurate. By no means is this a toy. Instead this is an inexpensive model. Had this model at this scale (which is pretty big) been made of diecast metal, it would have cost easily over $100 and weigh about 3 pounds. (I know because it is similar in size to another metal model I stock).
At this price level, size (each track about 6.5 inches long and from track to track about 5 inches wide) and at its weight (about 1 pound) this piece could easily be confused as a toy. But if taken outside to the beach or to the sand box and played with, it would not last long.
As mentioned, the pieces are proportional and to scale, which means that the arms and links are actually very fragile since they are made of plastic.
The arm is movable in all the ways that the real thing moves, it can pivot along the vertical axis and the arm can extend on its two articulations. The shovel/scoop is also adjustable. The arm is made of two elements (pieces) and it has 3 cylinders, each of those 3 cylinders have rod that extends and contracts as the arm moves to different positions. The scoop is also adjustable and it also has a cylinder that expands and contracts. All in all, the mechanical links are all operable and accurate.
This model also has the optional (in the real world) blade attachment at the font and this blade is adjustable up and down and also rotated along the vertical axis.
The whole cab/upper part of the vehicle can rotate 360 degrees. The interior of the cab is also accurate, showing the seat, the two side joy sticks and the two levers at the center. The door of the cab does not open
The coloring of the model along with the branding and markings all seem to be where they are supposed to be.
This model is pretty big, it measures about 8.25 inches, from the end of the tracks at the back to the front of the blade . From track to track, it measures 5 inches wide. From the ground to the top of the cab it measures 5 inches high.
The box measures 16.5" x 5.5" x 8"