Scholl Velvet Smooth replacement rollers are designed for use with Scholl electronic foot files. This pack contains 2 gentle coarse rollers in mint green color that effectively remove hard skin and help maintain smooth feet. The rollers feature mineral particles for optimal exfoliation results. These replacement rollers are compatible with Scholl Velvet Smooth electronic foot files. The gentle coarse grade is suitable for regular maintenance of feet after initial hard skin removal. Each roller head can be easily attached and removed from the device. For best results, use on dry feet only. Replace rollers when effectiveness diminishes, typically after 3-4 months of regular use.