The HFCN-440 from Mini Circuits is a Space Qualified RF Filter with Frequency 500 MHz to 2.5 GHz, Cut Off Frequency 440 MHz, Stop Band Frequency 230 to 350 MHz, Power 7 W, Insertion Loss 1.3 to 2 dB. Tags: Surface Mount. More details for HFCN-440 can be seen below.