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Product description Package included: 20 * cable clips (with 5 different size included) for cord with 3/ 5/ 7/ 9/ 13 mm inner diameter Helps reduce EMI on AC power lines. Black plastic enclosed ferrite core for 5 mm AC power cords. Great for cutting noise on USB, firewire, phone, power cord, coaxial, audio, video cables, etc. This rectangle ferrite Bead can be widely used in a variety of Data cables, USB cable, telephone line, network line to shield external electromagnetic interference. Easy to install with double snap clips; Reduce electro-magnetic interference and improve signal integrity. Easy structure and convenient installation. Just clip it on and you will get clearer signal and faster data transmission.
