1,Effectively improve the electromagnetic field around the solenoid to avoid external interference. 2,Will not cause the transmission signal distortion and affect your audio, you can use it at ease. 3,Easy to install and convenient to use, can be disassembled, greatly save you valuable time. 4,The noise suppressor filter is with good performance and high efficiency, have a long service life. 5,Used in all kinds of automotive electronic connecting wires, wiring harnesses, home appliances. Item Type: Noise Suppressor Filter Material: Nickel Zinc Ferrite Color: Black ID: Approx. 3.5mm/0.14in, 5mm/0.20in, 7mm/0.28in, 9mm/0.35in, 13mm/0.51in Application: AV cable, coaxial audio, audio power cord, IP serial camera, etc. All kinds of automotive electronic connecting wires, wiring harnesses, home appliances and electrical appliances. Clamp on the signal line to play the role of anti-interference and electromagnetic compatibility. Clamp on the power cord to stabilize the current and improve the sound quality. 50 x Noise Suppressor Filter Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.