The BLK-K44+ from Mini Circuits is a DC Block with Frequency 0.01 to 40 GHz, Insertion Loss 0.06 to 0.75 dB, Breakdown Voltage 200 V, Input Power (Avg) 33 dBm, Return Loss 14.5 to 35 dB. Tags: Connectorized, Inner DC Block. More details for BLK-K44+ can be seen below.