Note:The higher in frequency and the longer of the length, then the greater of the attenuation. Please pick the length according to your usage.Description:These cables are RG58 shielded, connections inside are soldered and the cable is made of copper conductors. RG58 coax is recommended for high-powered applications or users who simply want the best coax possible. Specification: Type: N Male to BNC Male RG58 Cable Impedance: 50 ohm Cable length: 20 Inch Nickel plated connector body Package Includes:2 x N Male to BNC Male RG58 Cable