The FLL15-450 from Sirius Microwave is a Low Pass RF Filter with Frequency 0 to 400 MHz, Stopband Frequency 550 MHz to 3 GHz, 3 dB Cutoff Frequency 460 MHz, Insertion Loss 0.6 dB, Rejection 60 dB. Tags: Module with Connector, Lumped Component Filter. More details for FLL15-450 can be seen below.