Wire Gauge:
4.0mm: 16-13ga
5.5mm: 13-10ga
6.5mm: 13-8ga
Max Amps:
4.0mm: 75 amps
5.5mm: 150 amps
6.5mm: 200 amps

This is on Castle website. Don't know what Novak rates theres at but they ought to be close.