The BRF-1600-1000-C5 from COTS RF is a Band Stop Filter with Stopband Frequency 1100 to 2100 MHz, Bandwidth 1000 MHz, Insertion Loss 1 dB, Rejection 60dB @ 1600 MHz, VSWR 2.00:1. Tags: Module with Connectors, Notch Filter. More details for BRF-1600-1000-C5 can be seen below.