Dental The number 12 in a 3 unit formula 12-6-8 indicates the blade is A 12 mm in length B 1.2 mm in length C 12 mm in width D 1.2 mm in width 💡 Explanation The number 12 in a 3 unit formula 12-6-8 indicates the blade is ✓ Correct Answer: D. 1.2 mm in width