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: 50g Helps reduce electromagnetic interference in AC power lines. Ferrite core in a black plastic case designed for 5mm AC power cords. Ideal 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 improve signal clarity and data transmission. Package Content: 6 x Ferrite Core Filters Note: The package includes only the items listed above. Other products are not included. Lighting and display settings may cause slight color variations between the image and the actual item. Measurement error allowance: +/- 1-3 cm.