Materials:

BNC: Body – Brass, Tarnish Resistant Plating Center Contact – Gold Plated Beryllium Copper
Insulation: Teflon per ASTM-D-1457
Finish: Body and Fittings – Tarnish resistant, Center Contact – Gold Plated
P.C. Pins: Silver Plated
Marking: “POMONA 4578” located approximately as shown

Ratings:

Operating Voltage: 500 VRMS Max.
Operating Temperature: -65°F - +165°C
Nominal Impedance: 50 Ohms