12 cm professional nano glass nail file transparent sanding polishing grinding art manicure tool

material: 100% glass (nano technology material ) color: transparent size: 12*1.4cm purpose: to trim the nail surface. to increase the brightness, you only need to gently rub the nails for a few seconds to instantly brighten the nails. suitable for the crowd: all ages can be used with confidence. weight: 30g the product is compact and easy to use. after polishing, the crystal-like luster lasts for 4 weeks, and the continuous use time is up to 1-2 years. the glass material is safe and harmless. the glass foil surface is extremely delicate and will not cause damage to the nail surface.syi