The CAK-NM-NF from Xiamen HDG Telecom Equipments is a In Series RF Adapter with Frequency DC to 3 GHz, Contact Resistance 0.25 to 1 mOhms, Insulation Resistance 5000 MOhms, Mating Cycles 500 Cycles, Temperature -40 to 85 Degree C. More details for CAK-NM-NF can be seen below.