The WA7055H/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 100 V, Input Power (Avg) 2 W, VSWR 1.20:1, 1.50:1. Tags: Inner DC Block. More details for WA7055H/12 can be seen below.