Brand Name: XIALUOSHAN Origin: Mainland China High-concerned chemical: none Material: Metal Model Number: SX000189 Type: PROTRACTOR Name: 200mm Protractor Material: Carbon fiber plastic Measuring range: 0~360° Length: 200mm/7" Resolution: 0.05 ° Accuracy: ±0.3° Battery: CR2032 3V button battery (not included) Choice: yes semi_Choice: yes