Quantic PMI Model 7C6123D1-17D4M-CD-SFF is a Bandpass Cavity Filter with a center frequency of 6.1231 GHz and a bandwidth of 0.0174 GHz @ 3 dB. Precision machined housing and silver plated to provide the highest possible Q. Package size is 4.00" x 0.60" x 0.75" with SMA female connectors in and out.