EMI filters are utilized to attenuate noise present in electric currents transmitted through wiring, such as power cables and conductor paths. Within this category, common mode chokes serve as EMI filters that impede high-frequency noise shared among two or more data or power lines, while permitting the passage of the intended DC or low-frequency signal. Filter kits enable users to experiment with diverse sizes and types of filters, encompassing chokes, ferrite disks, plates, beads and chips, transformers, cores, resonators, and saw filters. These kits facilitate exploration and testing of various filter configurations for different applications and scenarios.