This DA style premium buffing head is sized at 160mm x 25mm and will fit backing plates upto 127mm(5 inch) Suitable for Velcro backing plates. 

This style of pad is designed to be used on a dual action polishing machine. 
 
The colour scheme goes as follows:
Green (Hardest) this is for cutting paintwork with lots of marks and scratches.
Orange (hard) this is good for cutting scratches that are not too deep.
Burgundy (medium/hard) this is good for oxidised / lightly scratched paintwork that needs restoring. 
Yellow (medium) this is good for light scuffed or wash marked paintwork. 
White (medium/soft) this is most popular for light scuffs and refining the surface.
Purple (Soft) this is popular for polishing paint work pereviously cut with a harder head to get a high gloss finish.
Black (Super Soft) this is for removing holograms, swirls and waxing.