The ZVBP-28000-K+ from Mini Circuits is a Band Pass Filter with Frequency 26500 to 29500 MHz, Center Frequency 28000 MHz, Insertion Loss 0.5 to 1.0 dB, Upper Rejection 30 to 103 dB @ 31000 to 48000 MHz, Lower Rejection 30 to 126 dB @ DC to 25000 MHz. Tags: Module with Connectors, Cavity Filter. More details for ZVBP-28000-K+ can be seen below.