Preferably for children. magnification: 2x, 4x 4x only with the green cap-lens down diameter Ø70mm acryl, plastic lenses and body 8 cm height The lid has air holes for insects, a grid at the bottom provides a scale (0.5 cm). We recommend to purchase more than one product or the relative postage costs would be too high. How should I hold the Triplet folding magnifier?This magnifier can also be printed upon (personalised).