The BRF-1380-20-L7-100W from COTS RF is a Band Stop Filter with Stopband Frequency 1370 to 1390 MHz, Bandwidth 20 MHz, Insertion Loss 1 dB, Rejection 45dB @ 1370-1390 MHz, Power 100 W. Tags: Module with Connectors, Notch Filter. More details for BRF-1380-20-L7-100W can be seen below.