UNIQUE DESIGNDifferent sizes for both sides of the skate---front 6inch(150mm), rear 5.5inch(140mm)---specific design to protect the surface from scratching when riding. polishing, to reduce abrasion for both pads itself, plate and surface. HIGH QUALITYTop quality, sponge pad, foldable, washable and reusable. Used for all kinds of layer paints, waxing, polishing and sealing glazes, to clean and improve their lightness. The biggest advantage of our pads is to lock and retain the polishing compound (prevents falling off at high speed). And they have great heat dissipation capacity. EASY TO USECan be used in pneumatic or electric polisher. Used for auto car detail polishing. With velcro you can easily change the sponge. It is suggested to wash them with clean water and dry them naturally after using them. ADVANCED MANUFACTURING TECHNOLOGYsoft and fine workmanship, do not damage the surface, washable and save energy. the money. They are lightweight and easy to assemble. Made of open cell foam which improves air circulation. VARIOUS DIFFICULTIESThere are five different colors of the sponge pad with different hardnesses: Yellow> Orange> Blue> White> Black, effective cutting and polishing the toughest car oxidation coating, scratches.