This product can also be known as a slide chart or slide rule, dosage calculator, nomographs, metric converters. pocket sliders, slide guides, slide chart, slide rule analogue calculators, slide scales – no-one likes to make things easy. The main principle of the slide mailer is that information is revealed through apertures as the slide piece is pulled along. This rectangle shape can perform simple calculations and reveal product technical data. A slide calculator is designed to be kept as a useful reference tool. These are very popular for technical sales and fully brandable on both sides. Although we have produced a wide variety of these, this is normally a custom mailer as no two people want to convey the same information.