The FLL15-370 from Sirius Microwave is a Low Pass RF Filter with Frequency 0 to 350 MHz, Stopband Frequency 520 MHz to 2 GHz, 3 dB Cutoff Frequency 370 MHz, Insertion Loss 1 dB, Rejection 80 dB. Tags: Module with Connector, Lumped Component Filter. More details for FLL15-370 can be seen below.