Checkline J-200 [J-200-D] Analog Dial Thickness Gauge, 10mm Range, Depth Of Jaw 200 mm (7.87 Inch), Feeler D (10 mm Curved) For Hard Leather, Plywood, Fiberboard. Measuring Range: 0 - 10 mm / 0 - 0.40 inch, Jaw Depth: 200 mm / 8 inch, Resolution: 0.01 mm / 0.0004 inch. The J-200 thickness gauge features an easy to read analog display along with the high accuracy. The J-200 model is available with 5 different feelers, which can be found below. Measurement is done by a spring force. Opening by lifting device (lever) - self closing. The J-200 is ideal for determine the thickness of leather, textiles, cardboard, felt, rubber, sheet metal, foil, plywood, plastic, etc.