The WTRCT5-890-990-0.2-1.6-50-1 from Wainwright Instruments is a Tunable Filter with Frequency 0.89 to 0.99 GHz, Tunable Frequency 100 MHz, Bandwidth 0.2 MHz, Rejection 50 dB, Insertion Loss 0.5 to 2.5 dB. Tags: Module with Connectors, Mechanically Controlled. More details for WTRCT5-890-990-0.2-1.6-50-1 can be seen below.