Brand Name: Monster Cable | Cable or Wire Type: F | Color: Yellow | Connection Method: F-Connector | Connector Type: F | Frequency: 900 MHz | Impedance: 75 Ohm | Number in Package: 1 pk | Packaging Type: Carded | Sub Brand: Just Hook It Up This coax F grounding block is used to protect cable and antenna installations from damage caused by lightning. It has an anti-corrosive yellow-chromate overcoast. | Use to protect system from damage caused by lightning | For cable and other types of antenna installations | Anti-corrosive yellow-chromate overcoat | 75 ohm, 5-900 MHz