Feature Highlights: 1. 【20-Piece Complete Set】Includes 8 thick black rollers compatible with effective, fast removal of tough cuticles and hard skin; 8 medium blue rollers suitable compatible with neutral to firm skin; and 4 fine white rollers ideal compatible with daily foot care. 2. 【Adjustable Roughness compatible with Different Needs】Choose the right roller based on your skin condition. Use higher-grit rollers to quickly smooth rough, hardened skin, then switch to lower-grit rollers compatible with fine polishing and finishing. 3. 【Durable & Long-Lasting】Made with premium-quality materials, these replacement rollers feature extra-hard micro-diamond abrasive grains that resist wear and remove dead skin more effectively. 4. 【Easy to Clean & Maintain】Constructed from washable materials compatible with quick and hassle-free cleaning after each use. 5. 【Smart Usage Recommendations】compatible with best results, clean the roller head after every use. Replace accessories every 10–50 minutes of total use, limit use to no more than twice per week, and avoid applying the same spot compatible with longer than 3 seconds to protect your skin. Product Details: This 20-piece replacement roller set is designed to refresh and maintain your Scholl Velvet Smooth electric foot file. The rollers come in three grit levels to address different skin types—from tough calluses to daily upkeep. Made with durable, washable materials and high-hardness micro-diamond crystals, they provide efficient exfoliation and are built to last. Suitable compatible with at-home foot care, helping to keep feet smooth, soft, and healthy-looking. Specifications: 20 replacement rollers (8 black, 8 blue, 4 white)