These refill are made from abrasive material and fit for standard callus remover, working with dead skin remover as smoothly as one. All of the coarse surface is effectively controlled within the range will never hurt skin or tissue.Color: blue,pinkMaterial: plasticSize: 6x2.5x2.5cm. with standard electric callus remover, easy to install and replace.Keeping callouses removed and skin moisturized is imperative to prevent cracks would be hard to heal.Ergonomics design, never hurt skin or tissue.Remove dead skin and callus effectively and quickly.Package Contents: 5* Foot FileOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +- 1-3cm.