6-line vial (All aluminum super G-levels are used 6-line vial.)Measurements of gradients of 1/100 and 2/100 can be made.It is processed extremely accurately.Precision is: ±1.00mm/m=within±0.0573°Protects from flaws by soften a shock when falling vertically.Easy to carry and measure with handles.A measurement of a pipe can be made with V-grooved measuring face.A measurement of the vertical can be made from the front.Horizontal vial (for all kinds)The light absorption sheet absorbs the light at a well-lit area and emits the light at a dark area for several minutes.Easy to read with magnifying lens.Precision is adjustable.Vertical vial (for all kinds)Measurement of the vertical can be made.With magnetIdeal for steel-frame construction as well as plant construction.With angle scale.A measurement of the normal gradient can be made with 45°vial.