■ For inside micrometer and bore gage setting ■ Deviation (difference between the order size and the size marked on supplied setting ring) Ø2-100: ±3.0μm Ø100-300: ±5.0μm ■ Accuracy: Ø2-100: ±1.0μm Ø100-250: ± 2.0μm Ø250-300: ±2.5μm ■ Range: Ø2-300mm