BrickLink - Set 9757-1 : LEGO Touch Sensor with Cable [Mindstorms:RCX] - BrickLink Reference Catalog
LEGO MINDSTORMS EV3 Building Set Includes 3 Interactive Servo Motors, Remote Control, Improved And Redesigned Color Sensor, Redesigned Touch Sensor, Infrared Sensor And 550+ LEGO Technic Elements : Everything Else