The FB1003 from Asartech is a Band Pass Filter with Frequency 950 to 1050 MHz, Bandwidth 100 MHz, Center Frequency 1000 MHz, Insertion Loss 2.5 to 4 dB, Rejection 35 to 70 dB. Tags: Module with Connectors, Harmonic Filters, Lumped Component Filter. More details for FB1003 can be seen below.