The WTRCDB5-400-500-2-12-50 from Wainwright Instruments is a Tunable Filter with Frequency 0.4 to 0.5 GHz, Tunable Frequency 100 MHz, Bandwidth 2 MHz, Rejection 50 dB, Insertion Loss 0.5 to 0.75 dB. Tags: Module with Connectors, Mechanically Controlled. More details for WTRCDB5-400-500-2-12-50 can be seen below.