These are special equipment that allows the material contained within them to be unloaded by means of an automated system for opening the bottom.
The technical features are:
- Useful volume from 6 to 10 m3
- Expected load inside the body 15 tons. equal to 6/8 m3 of concrete or 8/10 m3 of excavated material
- Empty weight of the box complete with control unit, batteries and battery charger KG. About 3200
- Construction with inclined bottom that can be opened with two doors controlled by 4 double-acting hydraulic cylinders that allow the opening and closing of the bottom.

- The box will be contained within a structure in profiles that maintains its shape, allows the 4 corner legs to rest on the ground and through a chain Æ 16 gardo 100 with four arms included in the box it is possible to perform all the necessary maneuvers.
The chain will be equipped with lower safety hooks.
- A 24 Volts battery-powered hydraulic unit is mounted on board and is also equipped with a charging element.
- Electrical panel near the control unit.
- The four operating cylinders mounted on the heads are activated by means of solenoid valves and radio control.