The DB-A1A25A-18G100V/9XX-9X from Rosnol is a DC Block with Frequency DC to 18 GHz, Insertion Loss 0.5 dB, Breakdown Voltage 100 V, VSWR 1.25:1, Return Loss 19.08 dB. Tags: Connectorized, Inner DC Block. More details for DB-A1A25A-18G100V/9XX-9X can be seen below.