The QSS NFNM AR 00 from NexTek, LLC. is a RF Surge Protector with Frequency 380 to 470 MHz, Input Power 0.8 kW, Insertion Loss 0.05 to 0.1 dB, Operating Temperature -40 to 90 Degree C, Return Loss 23.1 to 32.3 dB. Tags: Quarter-Wave Shorting Stub (QWS). More details for QSS NFNM AR 00 can be seen below.