The CL12D52-300-CD-SFF from Quantic PMI (Planar Monolithics) is a Band Pass Filter with Frequency 12.37 to 12.67 GHz, Bandwidth 300 MHz, Center Frequency 12520 MHz, Insertion Loss 4 dB, Rejection 40dB @ DC to 12.22GHz and 40dB @ 12.82 to 37.56GHz. Tags: Module with Connectors, Combline Filter. More details for CL12D52-300-CD-SFF can be seen below.