Prospera PL023R Refill Roller Heads are perfect for the PL023 foot smoother. The grinding roller adopts unique trace mineral grains, soft and comfortable. It allows rotation of 360 degrees. The package comes with 2 coarse, 2fine, 2 regular heads for best use on foot skin and other areas. Cleaning is efficient and complete. Use the foot smoother once a week, maximum twice a week.