Tajima OPT-170S Optima Level, 6.7 inches (170 mm),

V-groove measuring surface that can be firmly fixed to pipes. Multiple measurements are possible on the top and bottom of the main unit. Equipped with a powerful neodymium magnet with a magnetic flux density of approximately 13.0 inches (330 mm). Uses: General measuring level Length: 6.7 inches (170 mm) Bubble tube: horizontal, vertical, 45° Indicator Lines: 6 horizontal, 4 vertical & 45° rings Product specifications: Glow in the dark plate included