It is a preservative device that generates sulfur dioxide. It consists of sheets of paper and polyethylene, between which is inserted metabisulfite sodium, that once it gets in contact with moisture, it generates SO2. We are sales representatives of Quimetal SA.

Use: fits over the grapes contained in the box, between sheets of absorbent paper.

Purpose: it is a device meant to preserve, designed to protect the grapes of Botrytis fungus, neutralizing the negative effects of the fungus.