Pipes can be measured using the measuring reference surface with the V shaped groove. ・6-line vial ・Measurements of gradients of 1/100 and 2/100 can be made. ・Magnifying lens for easier us. ・Being phosphorescent, the device draws on light from well-lit places to emit light for a few minutes in darker applications. Precision is adjustable. SPECIFICATIONS ・Hardened extruded Aluminium alloy ・Alumite clear painted finish ・6-line acrylic horizontal vial with lenses ・6-line acrylic vertical vial SENSITIVITY / ACCURACY Sensitivity 0.35mm/m=0.0201˚ Accuracy: Within ±1.00mm/m±0.0573˚