A measurement of the normal gradient can be made with 45°vial.Ideal for steel-frame construction as well as plant constructionMagnet● Measurements of 1/100 and 2/100 of a gradient can be made.● Easy to read with a magnifying lens● The light absorption sheet absorbs the light at a well-lit area and emits the light at a dark area for several minutes.● Precision is adjustable.● Curing treatment of aluminum alloy extrusion material● Coating of anodized aluminum clear● 6-line acrylic horizontal vial with lens● 6-line acrylic vertical vialSensitivity 0.35mm/m=0.0201°Precision ±1.00mm/m=within±0.0573°H51 X W19.5