3 Ohm, non-inductive ceramic bulk power resistor, washer style, peak pulse energy 27,600 joules. Kanthal Globar part number 913WS3R0K.
Used. To view a full specification sheet (PDF),
click here (see the 913WS series at the bottom). There is a thin film of oil present on some of the resistors due to prior immersion in oil (non-PCB).