The ALQP-NFNFB from L-COM is a RF Surge Protector with Frequency 800 to 2250 MHz, Insertion Loss 0.2 dB, Operating Temperature -40 to 85 Degree C, Voltage Level 2500 V(Dielectric Voltage). Tags: Quarter-Wave Shorting Stub (QWS). More details for ALQP-NFNFB can be seen below.