The BR1050-300-CD-TNC-MF from Quantic PMI (Planar Monolithics) is a Band Stop Filter with Stopband Frequency 9850 to 10150 MHz, Insertion Loss 1.5 dB, Rejection -45dBc @ 900 to 1200MHz, VSWR 2.0:1. Tags: Module with Connectors. More details for BR1050-300-CD-TNC-MF can be seen below.