The Model 5558 from Netcom is a Tunable Filter with Frequency 10 to 30 MHz, Bandwidth 0.6 to 1.4 MHz, Input Power 1 W, Peak Power 2 W, Insertion Loss 2.4 to 5.5 dB. Tags: Drop-In (Thru-Hole), Digitally Controlled. More details for Model 5558 can be seen below.