Description - Flit sprayer (also known as a Flit Gun).Flit was a DDT based insecticide manufactured by Esso. The sprayer consists of a barrel (cylinder) with a piston which forces air through a nozzle. The cylindrical container holds the liquid (Flit). This is filed through a screw cap. A tube extends from the front of the barrel downward into the reservoir. When pumped a jet of air passes across the top of the siphon tube causing a vacuum which draws insecticide upward from the reservoir. This is then atomised.