The light absorption sheet absorbs the light at a well-lit area and emits the light at a dark area for several minutes.A measurement of the normal grade can be made with 45°vial.A measurement of a pipe can be made with U-grooved measuring face.● ABS resin● Curing treatment of aluminum alloy extrusionmaterial● Coating of anodized aluminum clear and anodized aluminum polyester powder● Can measure a pipe● 4-line acrylic horizonal vialSensitivity 0.50mm/m=0.0286°Precision ±2.50mm/m=within±0.1432°