The Model 5557 from Netcom is a Tunable Filter with Frequency 4 to 10 MHz, Bandwidth 0.18 to 0.42 MHz, Input Power 1 W, Peak Power 2 W, Insertion Loss 2.4 to 4.7 dB. Tags: Drop-In (Thru-Hole), Digitally Controlled. More details for Model 5557 can be seen below.