This simple device can be connected to the inlet pipe of a conventional aspiration unit for pre-filtering dust particles. The air circulates along a circuit that makes the dust particles fall into the inner tank. More than 99% of the aspiration dust and dirt is removed, reducing the risk of obstruction of the aspiration pipes and makes the working life of the aspiration filters considerably longer. The dust tank is easily accessible and therefore cleaning the device is a simple and easy task. The device features anchoring elements especially adapted to the Mestra Eolo Suction unit. Made of high resistance polypropylene. 155mm (w) x 590mm (h) x 275mm (d).