Green SB, 400 grit wet dry, or 600 grit wet dry... To match it you'd have to grab a 500 grit abralon pad.
A worn piece of 400 grit sandpaper might be closer to 500 than anything other than the 500 grit abralon pad...
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"A word to the wise ain't necessary -- it's the stupid ones that need the advice." Bill Cosby
"Never argue with an idiot. They bring you down to their level and beat you with experience."