The use of a cage of metallic wires as a bead is proposed to measure the higher order modes (HOMs) in an X-band accelerating structure. These long thin wires can isolate the longitudinal electric field component from other field components and produce sufficient frequency shift in bead-pull measurements. In the setup described in this paper, the bead is made by sputtering silver film onto a thin nylon line through a specially designed fixture. The cage has a size of approximately 0.5mm in diameter, 2mm in length and more than six metallic wires of less than 0.1mm in width. The fabrication and calibration of the cage are described. The longitudinal electric fields of the lowest passband dipole mode TM 1 1 0 in a 30cm long X-band structure are measured by bead-pull measurements. Results are compared with the calculated ones obtained from URMELT-code.