Body size: 75 × 30 × 15 mm. Product Weight 38g Sensitivity 0.5mm / m = 0.0286° Accuracy ± 2.5mm / m = ± 0.1432° Material: body: acrylic resin. Liquid: Petroleum based liquid. Shinwa Rules Co., Ltd (Shinwa Sokutei) is the leading manufacturer of measuring instruments with the largest share in Japan in the area of metal scales.