MORTEIN INSECT KILLER FLYING ODOURLESS TWIN 375 ML MORTEIN Insect Killer Flying Odourless Twin is a powerful yet odourless insect killer that provides effective protection from troublesome flying insects. It is capable of killing flying insects within a 1 metre range, and eliminates up to 80% of flying pests in a few minutes. Unlike most insect killers, it is also safe to use around food, making it an ideal solution for domestic use.