The FAIR-RITE PRODUCTS part 0475167281 is a high-quality round cable snap-on ferrite core designed to improve the performance and reduce electromagnetic interference (EMI) in cables. With a 75 material composition, this ferrite core offers effective noise suppression in a frequency range of 200 kHz to 30 MHz. It is suitable for various applications that require EMI filtering and attenuation, including audio and video cables, power cords, and data cables. The snap-on design allows for easy installation on cables with a maximum width of .388. Enhance your cable's signal integrity and reduce unwanted noise with the FAIR-RITE PRODUCTS snap-on ferrite core."