The DC-BLOCK-3-43MF-1 from Radio Frequency Systems is a DC Block with Frequency 80 to 3800 MHz, Insertion Loss 0.25 dB, Breakdown Voltage 3 kV, VSWR 1.10:1, 1.40:1, PIM -165 to 160 dBc. Tags: Inner-Outer DC Block. More details for DC-BLOCK-3-43MF-1 can be seen below.