The SF2405-SMA from Fairview Microwave is a Low Pass RF Filter with Frequency DC to 30 MHz, Stopband Frequency 45 to 60 MHz, 3 dB Cutoff Frequency 30 MHz, Insertion Loss 1 dB, Upper Rejection 40 to 60 dB@45 to 60 MHz. Tags: Module with Connector. More details for SF2405-SMA can be seen below.