The WA8055H/12 from Weinschel Associates is a DC Block with Frequency 0.01 to 12.4 GHz, Insertion Loss 0.25 to 0.8 dB, Breakdown Voltage 200 V, Input Power (Avg) 2 W, Peak Power Up to 10 W. Tags: Inner-Outer DC Block. More details for WA8055H/12 can be seen below.