The WTRCFV6-400-450-0.2-2-65-5 from Wainwright Instruments is a Tunable Filter with Frequency 0.4 to 0.45 GHz, Bandwidth 0.2 MHz, Rejection 65 dB, Insertion Loss 0.75 to 1.5 dB, Operating Temperature 15 to 45 Degrees C. Tags: Module with Connectors, Mechanically Controlled. More details for WTRCFV6-400-450-0.2-2-65-5 can be seen below.