Quantic PMI Model CL10D8-300-CD-SFF is a Narrow Bandwidth Cavity Filter with a center frequency of 10.8 GHz and a bandwidth of 0.3 GHz @ 3 dB. Precision machined housing and silver plated to provide the highest possible Q. Package size is 2.25" x 0.40" x 0.50" with SMA female connectors in and out.