1. Nano glass technology, quickly and easily polish the foot skin, smooth and comfortable 2. Easily exfoliate dead skin, gentle without hurting the skin 3. Delicate rubbing design, not easy to damage the skin 4. The grip is comfortable and ergonomic, and the hand is just right 5. Water washable, easy to use 6. The edges are curved and smooth 7. Dimensions: Mango: 9.5x5.5x0.4cm, Prism: 11x6.5x0.4cm, Runway Circle: 10x4x0.4cm, Big Gouyu: 10.3x6x0.4cm, Egg: 10x5x0.4cm 8. Weight: Mango: 32g, Prism: 37g, Runway Round: 31g, Big Gou Jade: 40g, Egg: 34g