6 pcs clip on emi rfi noise ferrite core filter & 620pcs terminal connector housing sethelps reduce emi on ac power lines. black plastic enclosed ferrite core for 7mm ac power cords.great for cutting noise on usb, firewire, phone, power cord, coaxial, audio, video etc cables.easy structure and convenient installtion.just clip it on and you will get clearer signal and faster data transmission.colour: blackFerrite Core Filter:Type: Ferrite Core Noise SuppressorExternal Size(Approx): 3 x 1.7cm / 1.2 inch x 0.67 inch (L * D);Fit Cable Diameter: 3mm / 0.12 inchMaterial: Plastic(Housing), Ferrite ( Core);Terminal connector housing set:Model Number: Dupont Connector / Dupont Cable JumperBrand newCompatible Wire Gauge (AWG): 18-26AWGPin Spacing: 2.54mm (0.1inch)Rated voltage: 250VRated current: 3AThese work great with all your typical and breadboard style pin connectors and socketsThis kit comes with the most common dupont pin housings in addition to male and female crimp pins - all in a high quality caseMaterial: plasticPackage Contents:6 * Ferrite Core Filters620 * Terminal connector housing setOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.