My best guess and I'm sure someone here will correct me if I'm way off (charlest?) but since green scotchbrite is about 600, it's closest equivalent in Abralon would be 1000. I know that doesn't seem right, but Abralon is P rated and thus not the same as the U.S. standard more familiar to us.
Don
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"You cannot change the stripes of a leopard."
~Emmitt Smith