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The Stanley Classic Box Levels have a strong construction to withstand demands of the worksite. Their soft end caps add durability and resistance to shock. The levels have a block magnified central vial to make reading easier. In addition, they have a large tubular side vial for vertical measurements. Accuracy: ± 0.5mm/mLength: 60cm.Additional Information:• Length (cm): 60• No. Vials: 2• Level Type: Box Smooth• Accuracy (mm/m): ± 0.5mm/m