Stabila 80AM Magnetic Level 2 Vial 16063 40cm STB80ANM40 Stabila 80AM series magnetic levels:Strong and light profile for everyday use. One milled measuring surface. Vials are moulded in so no readjustment is required. High-precision vials for overhead measuring. High-quality powder-coating to protect against dirt ingress.Extra strong rare earth magnets to grip metal surfaces - up to 5 x stronger magnetic force than standard ferrite magnets. Measurement accuracy: In normal position 0.029° = ±0.5mm/m.Overhead measurement 0.043° = ±0.75mm/m.Length 400mm (16 in) STB80ANM40