The FL1003 from Asartech is a Low Pass RF Filter with Frequency DC to 1200 MHz, Bandwidth 1200 MHz, Stopband Frequency 1800 to 3000 MHz, Insertion Loss 0.5 to 1 dB, Rejection 40 to 45 dB. Tags: Module with Connector, Lumped Component Filter. More details for FL1003 can be seen below.