Different colored sponges have different softness Black (Fine) - Polishing And Finishing Pad, Provides A Rich Swirl-Free High Gloss Finish. Blue (Fine) - Polishing And Finishing Pad, Provides A Rich Swirl-Free High Gloss Finish. Yellow (Medium) - Polishing And Finishing Pad, Provides A Rich Swirl-Free High Gloss Finish. Orange (Coarse) - Light Cut & Polishing Pad, Final Cutting, Polishing Or Glazing Clear Coat Surfaces. White (Coarse) - Foam Polish Pad Standard Grade Cutting Pad, Excellent For Enamels, Acrylics, And Urethane.