Mini Protractor Stainless 100mm (20g) Diameter (mm): 40  Length (mm): 100 Graduation Plate thickness  (mm): 1.0  Header: 100mm Eyepiece: 2 Divider Plate Diameter: 40mm Body: Stainless steel (SUS 420J 2) Kajime Pin: Stainless steel Divider Plate Diameter: 40mm Japan Import Shinwa Rules Co., Ltd. (Shinwa Sokutei) is the leading manufacturer of measuring instruments having the largest share in Japan in the field of metallic scales.