This 5.5 in (14cm) GERmanikure crystal glass file is handcrafted in the Czech Republic from 3mm thick Bohemian glass formulated and tempered against breaking. The texture is permanently etched directly into the glass and never wears off. Use it wet or dry on natural nails as well as acrylics. File both directions without causing microscopic frays and gouges. Etched with an enduring mantra, each file is perfect for meditative use, reminding someone you care, conveying inspiration, or making a friend laugh. Uniform surface texture provides a strong smooth, polished nail edge. Cleans easily with soap & water yet durable enough for a chemical bath or high heat sterilizer. GERmanikure believes in long tool life, healthful living, and good environmental stewardship. Each file is made in the Czech Republic by fairly paid adult artisans. This item is guaranteed against unethical workmanship like child labor.