The D3TNF-200/400-N/N-GRI from K&L Microwave is a Tunable Filter with Frequency 200 to 400 MHz, Bandwidth 3 to 7 MHz, Rejection 40 dB @ 300 KHz, Input Power 50 W, Insertion Loss 0.5 dB. Tags: Benchtop, Digitally Controlled. More details for D3TNF-200/400-N/N-GRI can be seen below.