["Features:\r\nHelps 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.\r\nThis rectangle ferrite Bead can be widely used in a variety of Data cables, USB cable, telephone line, network line to shield external electromagnetic interference.\r\nEasy to install with double snap clips; Reduce electro-magnetic interference and improve signal integrity. \r\nEasy structure and convenient installation. Just clip it on and you will get clearer signal and faster data transmission.\r\n\r\nWarm Prompt: The item can shield EMI and RFI interference effectively. Please install them in place near the interference source.(Near the import and export of shielding for case as much as possible.)\r\n\r\nSpecifications:\r\nMaterial: Mn-Zn Ferrite\r\nColor: Black\r\nInner Diameter: 3.5mm\r\nSize: 3.5mm: outer dimension: 25x13mm\r\nQuantity: 1 Pc\r\nNote:\r\nPlease allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid\r\nDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\r\n\r\nNo Retail Package\r\nPackage Contents:\r\n1 x Ferrite Cable Clip"]