10pcs Pedi Replacement Roller -- Coarse (Roughness 40) Black 4. Effective and fast removal of thick horny layer. suitable for medium hard skin (roughness 60) blue 4. suitable for normal and hard skin fine (roughness 80) white 2. suitable for daily care of the feet. Use with different roughnesses -- Choose a roller adapted according to the condition of the skin of your foot. You can use a high roughness roller to quickly remove hard, rough skin. then use a low roughness roller for detailed sanding. Wide compatibility & packaging -- This product is compatible with Scholl Velvet Smooth. Scholl Velvet Smooth Wet & Dry. Scholl Velvet Soft. Note: Not compatible with Scholl Express Pedi. The product is nicely packaged, and the color box design is convenient for storage. and the replacement roller is not easy to lose or get dirty. High quality and easy clean -- the most favorable price. the greatest number of parts. Our replacement rollers have twice as many hard micro-diamond crystal abrasive grains. which resist wear and eliminate dead skin cells more effectively. Washable material ensures quick and easy washing. Recommended method of use -- It is recommended to wash the sand head after each use. to replace new accessories every 10 12 times. not to use more than twice or more per week. and the duration of the same piece cannot exceed 3 seconds to avoid damaging the skin.