A toy set of a special kind is the new Agrotron X720 from Deutz, in combination with 3 trailers from the Joskin-Cargo program. The interchangeable system consists of a silage trailer, a slurry tank, and a universal spreader body. These bodies can be mounted on a 3-axle chassis for deployment. When not in use, they can be parked on support legs without the chassis. The bodies, except for the slurry tank, are largely made of metal. The Deutz tractor and 3-axle chassis run on tires made of rubberized material.