The WTRCA6-400-450-2-6-40 from Wainwright Instruments is a Tunable Filter with Frequency 0.4 to 0.45 GHz, Bandwidth 2 MHz, Rejection 40 dB, Insertion Loss 0.6 to 0.75 dB, Operating Temperature 15 to 45 Degrees C. Tags: Module with Connectors, Mechanically Controlled. More details for WTRCA6-400-450-2-6-40 can be seen below.