The D5BT-125/250-5-N/N-GRI from K&L Microwave is a Tunable Filter with Frequency 125 to 250 MHz, Bandwidth 6.25 MHz, Input Power 50 W, Insertion Loss 1.3 dB, Supply Voltage 24 V. Tags: Benchtop, Digitally Controlled. More details for D5BT-125/250-5-N/N-GRI can be seen below.