The QSSTFTFAB00 from NexTek, LLC. is a RF Surge Protector with Frequency 2 to 2.4 GHz, Input Power 0.15 kW, Insertion Loss 0.05 to 0.10 dB, Operating Temperature -40 to 90 Degree C, Return Loss 26.5 to 32.5 dB. Tags: Quarter-Wave Shorting Stub (QWS). More details for QSSTFTFAB00 can be seen below.