FBU50 037-4 MCRF-STF passport and a certificate of quality MCRF-2000 30 ohm J MCRF 2KW MCRF-STF MCRF 800W 100 ohm J FBU50 037-4 MCRF-STF 2kW 6.7 ? J MCRF-T -2kW 5.8 Ohm FBU50 015-2 MCRF-STF 57.8KW 2.27 OHM J MCRF-STF 3, 6KW 30?J 250V; MCRF-STF MCRF-STF MCRF-ST 3.6KW 20 OHM J