Features: *Brand new and high quality *Made of high quality material, *10x TDK Ferrite Core Noise Suppression Filter Ring 5mm-13mm Diameter Cable Clamp RFI EMI *Noise cancellation for USB, Firewire, Phone, Powerline, Coaxial, Audio and Video cables. *Just clip on the cable and you will get a clearer signal *Widely used in computers, hard drives, audio equipment, copiers, fax machines, etc. *Suitable for various cable diameters Specification: *Dimensions: 12 x 25mm (5mm) *Type: 5mm, 7mm, 9mm, 13mm (optional) *Rectangle ratio: 20 *Coercivity: 16 (A/m) *Remanence: 200 (mT) *Curie temperature: 130 (℃) *Density: 4.9 (g/cm3) *Function: anti- *Material: soft magnetic (without magnetic) *color: gray *Quantity: 10pcs (optional) Package content: 10x TDK ferrite cores (optional) Notes: 1. Due to various factors such as display brightness and light brightness, the actual color of the product may be slightly different from the website picture. 2. Please allow a slight deviation between the data and the manual measurement. Made of standard material, quality assurance and practicality. Perfect function, bring you a wonderful experience. Every customer is entitled to a 30-day refund or replacement for damage/quality issues. If you have any questions, please feel free to contact us and we will solve it for you. 10Xtdk 5Mm Ferrite Core Noise Suppressor Filter Ring Cable Clip On Wire Rfi Emi