Product Size: Single size: length 1.3 cm, diameter and opening width 0.8 cm. Bag size: length 10.5 cm * width 7.5 cm * height 2.5 cm Material: Sandpaper. Specification: 180 grit is finer, 120 grit is medium, 80 grit is coarse. Package Contents: 1 bag of sanding bands (100 pcs). 1. Three-grit file: 80 for easily removing gel layers or shortening acrylic or artificial nails; 120 helps you quickly prepare the nail, file the nail edge, shape, and smooth; 180 has a smooth surface and is perfect for the natural nail and cuticle with the file's low speed. Multifunctional: Designed to fit most nail grinders, used for grinding, smoothing, shaping, shortening, and polishing for all nail art as well as cuticle removal. Easy to Use: Suitable for both manicure and pedicure. Works on natural nails (180) as well as artificial nails (180, 120, 80). Portable & Lightweight: Easy to carry and portable to take out, you can do your nail art anytime, anywhere. Professional for both home and salon use. Durable & Saves Your Money: High hardness, durable, and wear-resistant.