Filter boxes in transparent antistatic plastic with a lid shaped to ensure the blocking of the filter on the circumference. In this way the filter does not move inside the box and, at the same time, the top remains distant from the surface of the filter: thus avoiding any contact and possible loss of the sampled particolar (these boxes are in compliance with the requirements set by the method UNICHIM n°285: 2003).

The boxes are equipped on the circumference of lateral slides to facilitate the grip of the filter with tweezers.