RG-58U is a type of coaxial cable often used for low-power signal and RF connections. The cable has a characteristic impedance of 50 Ω.
The outside diameter of RG-58 is around 0.2 inches (5 mm). RG-58 weighs around 0.025 lbs/ft (35 g/m), exhibits approximately 25 pF/ft (82 pF/m) capacitance and can tolerate a maximum of 300 V potential (1800 W).
The RG-58A/U features a flexible center conductor.