• 1 Inch Gauge Block, AS-1 Grade with Inspection Certificate
• +10 µin deviation from nominal length
• Steel construction for long lasting durability
• Nominal size is printed on the front, identification number printed on top
• Rectangular base (Overall dimensions: 1" x 0.35" x 1.37")
• Ideal for calibrating measuring equipment such as micrometers, sine bars, calipers, and dial indicators.