The WTRCFV6-450-500-0.2-2-65-4 from Wainwright Instruments is a Tunable Filter with Frequency 0.45 to 0.5 GHz, Tunable Frequency 50 MHz, Bandwidth 0.2 MHz, Rejection 65 dB, Insertion Loss 0.75 to 1.5 dB. Tags: Module with Connectors, Mechanically Controlled. More details for WTRCFV6-450-500-0.2-2-65-4 can be seen below.