The WVR-902.5B-25M01 from Wevercomm is a Band Stop Filter with Stopband Frequency 890 to 915 MHz, Bandwidth 25 MHz, Insertion Loss 2 dB, Rejection 40 dB Min @ 890MHz to 915MHz, VSWR 1.50:1. Tags: Module with Connectors, Cavity Filter, Notch Filter. More details for WVR-902.5B-25M01 can be seen below.