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These are snap-on ferrite choke filter.
Measures 1-5/8" (L) x 1-1/8" (H) x 3/8" (T). Opening measures 7/8" x 3/8".
Snap-On chokes can be used to reduce high frequency interference caused by home electronics (radio transmitter, telephone, television, audio equipment, and more). The innovative snap-on design makes it easy to install on most any type of equipment by snapping around antenna cables, power cords, speaks cables, microphone cables, telephone cords, computer cables, and more. The line choke reduces line transmitted electromagnetic interference (EMI) and transmitted radio frequency interference (RFI). Line transmitted interference is often caused by motors in appliances such as blenders, garbage disposals, and others. The noise is conducted through the AC power wiring. To reduce this type of noise, connect the snap-on choke around the AC power cord as close to the appliance generating the noise as practical.
