Product Name: Ferrite Core Filter Type: Ferrite Core Noise Suppressor Outer Size (Approx): 2.8 x 1.5 cm / 1.1 x 0.6 inch (L*D) Suitable Cable Diameter: 5 mm / 0.197 inch Material: Plastic (body), Ferrite (core) Color: Black Net Weight: 50 g Helps reduce electromagnetic interference in AC power lines. Ferrite core in a black plastic case designed for 5 mm AC power cords. Effective for interference suppression on USB, Firewire, phone, power cord, coaxial, audio, video, and other cables. Simple structure and easy to install. Just clip it onto the cable to help achieve clearer signal and faster data transmission. Package Content: 6 x Ferrite Core Filters Note: Only the items listed above are included. Other products are not included. Lighting and display settings may cause slight color differences between the image and the actual item. Measurement error is permitted within +/- 1-3 cm.