The AT35A-4041-A-I-18 from Aaren Technology Ltd is a DC Block with Frequency 30 MHz to 18 GHz, Insertion Loss 0.80 dB, Breakdown Voltage 50 V (Working Voltage), VSWR 1.20:1, Operating Temperature -55 to 165 Degree C. Tags: Inner DC Block. More details for AT35A-4041-A-I-18 can be seen below.