Introduction: The tester is applying to test the thickness of flat sheet specimens. It measures up to the standard of paper and cardboard thickness testing method---iso534, iso438, gb/t451.3 and gb/t1938. Technical characters: 1, measure range: 0-18mm 2, accuracy: 0.001mm 3, measuring area: 200mmª 4, pressure: 100 kpa, 5, value error: ª2.5um or ª0.5% 6, dimension: 80+120+120 (mm) 7, weight: 2.5kg Plywood carton