Antibacterial set in resistant white PP material. Includes biros, mechanical pencil (lead 0.5 mm included), 15 cm ruler and rubber.Products with antibacterial treatments are able to drastically reduce the bacterial levels present on the surfaces of the materials, thanks to the addition of permanent static microbial agents, with high effectiveness in inhibiting and preventing bacterial contamination.Item according to the ISO 22196 standard, which determines the antibacterial activity in plastic materials and non-porous surfaces. This allows us to know the effectiveness of microbial inhibition that additives have on treated objects by means of a quantitave evaluation.