The QRF-3600-3800-50 from Qualwave is a Band Stop Filter with Stopband Frequency 3600 to 3800 MHz, Bandwidth 200 MHz, Insertion Loss 1.2 dB, Rejection 50 dB, Power 10 W. Tags: Module with Connectors. More details for QRF-3600-3800-50 can be seen below.