The EM-7820-1 from EM Antennas is a Line Impedance Stabilization Network with AC Voltage 220 to 440 V, Frequency 10 kHz to 30 MHz, Inductance 50 to 250 uH, Maximum Continuous Current 50 A, Power Line Frequency DC to 63 Hz. More details for EM-7820-1 can be seen below.