The FLP-220 from Synergy Microwave Corporation is a Low Pass RF Filter with Frequency DC to 200 MHz, 3 dB Cutoff Frequency 220 MHz @ 3 dB, Insertion Loss 1 dB, Rejection 20 to 35 dB @ 300 to 385 MHz, Upper Rejection 20 to 35 dB. Tags: Plug In. More details for FLP-220 can be seen below.