The QRF-1785-1805-40 from Qualwave is a Band Stop Filter with Stopband Frequency 1785 to 1805 MHz, Bandwidth 20 MHz, Insertion Loss 2 to 5 dB, Rejection 40 dB, Power 20 W. Tags: Module with Connectors. More details for QRF-1785-1805-40 can be seen below.