V-1 (A-2) IIW Angle Beam Calibration Block (Metric). Made to British Standard: BS-2704, German Standard: DIN 54-120, Australian Standard AS 2803 and ISO 2400. Material: A36/1018 Carbon Steel. Thickness of 1″ / 25 mm, Height of 4″ / 100 mm for straight beam calibration. 4″ / 100 mm radius with saw cut at Index Point for Angle Beam Calibration: Determining Beam Index Point and Distance Calibration (signals at 4″ / 100 and 8″ / 200 mm). 2″ / 50 mm bore hole for Probe Angle verification. 0.06″ / 1.5 mm bore hole for sensitivity adjustment. Includes Form Fitted Wood Case.