The MUYA GT235 Thickness Gauge is a portable dial-style gauge for measuring the thickness of sheet materials such as paper, film, leather, or thin plastics. It uses a spring-loaded upper and lower measuring surface with a lever mechanism, reading down to 0.01mm resolution across a roughly 0-25mm range, with metric/imperial unit switching on its LCD display. A zero-set function at any position and a data output port make it convenient for both quick spot checks and logged quality-control measurements.