The 01S1148-00 from Waka Manufacturing is a Band Pass Filter with Frequency 27.5 to 29.5 GHz, Bandwidth 2000 MHz, Center Frequency 28.5 GHz, Insertion Loss 6 dB, Rejection -30 dB @ 21.5 to 24.5 GHz. Tags: Module with Connectors. More details for 01S1148-00 can be seen below.