The ZXLF-K42M+ from Mini Circuits is a Low Pass RF Filter with Frequency DC to 0.3 GHz, Stopband Frequency 660 MHz to 10 GHz, 3 dB Cutoff Frequency 0.41 GHz, Insertion Loss 2.8 to 3.5 dB, Rejection 16 to 43 dB. Tags: Module with Connector, Reflectionless Filter. More details for ZXLF-K42M+ can be seen below.