Model: 2-piece set Material: Heat-treated spring steel sheet Size: 100mm (4 inches) Accuracy: 0.005-0.02 Scope of application: gap measurement System: Metric and English Blade length: 100mm Number of blades: 16 (pieces) Blade thickness: 0.127-0.508 (mm) Blade shape: Type A Measuring range: 0.127-0.508 (mm) Net weight: 70 grams Type: 4-inch elbow feeler gauge