Transmitter for a hydraulic actuation element

The transmitter (1) has a cylinder bore, which is formed in a cylinder housing (10). A piston is mounted in the cylinder bore in displaceable manner. The cylinder housing is partially made of a plastic material and has an inner wall and an outer wall in a double wall space area (120). A hand lever (130) is provided, with which the position of the piston is influenced in the cylinder bore. A fixing element (110) is provided for fixing the transmitter on handlebar of a handlebar-steered vehicle.