Materials:

Body: Gold Plated Beryllium Copper
Male Contact: Gold Plated Brass
Female Contact: Gold Plated Beryllium Copper
Dielectric: Teflon per L-P-403
Finish:
Body and Contacts: Gold plated per MIL-G-45204, Type II, Class 2
Marking: “Pomona 4289”
Ratings:

Voltage:
Shield/Earth: 30VAC/60VDC Max.
Inner Conductor/Shield: 335VRMS Max.
Operating Temperature: -65ºC (-85ºF) to +165ºC (+329ºF)
Nominal Impedance: 50 Ohms
Frequency Range: 0-12.4 GHz