When writing becomes too small, or fine details are no longer discernible at hobby or work, a magnifier or reading aid is needed. Eschenbach magnifiers and reading aids are quality products with precise lens manufacturing for your sensitive eye. Precise metal magnifier in matt chrome-plated brass housing with eyelet. Lens frame made of black lacquered metal. Lens biconvex lens diameter 30 mm, magnification 4.0 x, 6.0 x and 10.0 x.