Thought this might come in handy here. :)
SCOTCHBRITE GRIT CHART
7445 - White pad, called Light Duty Cleansing - (1000)
7448 - Light Grey, called Ultra Fine Hand - (600-800)
6448 - Green, called Light Duty Hand Pad - (600)
7447 - Maroon pad, called General Purpose Hand - (320-400)
6444 - Brown pad, called Extra Duty Hand - (280-320)
7446 - Dark Grey pad, called Blending Pad (180-220)
7440 - Tan pad, called Heavy Duty Hand Pad - (120-150)