The CEIA-158 from Novaris is a RF Surge Protector with Frequency 500 MHz to 1 GHz, Input Power 50 kW, Insertion Loss 0.1 to 0.2 dB, Operating Temperature -40 to 85 Degree C, Return Loss 20 to 26 dB. Tags: Spark Gap. More details for CEIA-158 can be seen below.