The F3752 from Teledyne Microwave Solutions is a Band Stop Filter with Stopband Frequency 0.5 to 2 GHz, Bandwidth 6 to 50 MHz, Insertion Loss 1.5 dB, Power 0.003 W, Return Loss 10 dB. Tags: Module with Connectors, Notch Filter. More details for F3752 can be seen below.