The HRMA-CF- 12-13 from HRmicrowave is a Band Pass Filter with Frequency 12 to 13 GHz, Insertion Loss 2.5 dB, Upper Rejection 60 dB, Lower Rejection 70 dB, Return Loss 20 dB. Tags: Module with Connectors, Combline Filter. More details for HRMA-CF- 12-13 can be seen below.