It's a brand name. In a few countries, such as Australia, there used to be a make of sticky tape (Scotch tape) with this name, which might explain why it's in a list with stationery items. In many other countries, such as Britain, it's a condom. I don't know what staff in offices get up to in Brazil, but I somehow doubt that the nation's corporate stationery cupboards are stocked with rubberware of an intimate nature.

Brasileira? Durex é a marca registrada para uma série de preservativos que eram feitas pela empresa britânica , SSL International. No Brasil, geralmente referimos o durex a outra coisa. rsrs. Se tiver qualquer questão ou duvida, fique a vontade para entrar em contato comigo. Atenciosamente, Thiago

Durex is a brand of adhesive tape in Latin America (like Scotch tape).

it's adhesive tape

It's a n adhesive tape. Like 'Coke' or 'Ford'. 'Durex' is the name of an adhesive tape.