The Stabila 81 SV Magnetic Rare Earth torpedo levels are available in two versions, either with a 45° fixed vial or an adjustable 360° vial. Both versions feature V-grooved base with strong rare earth magnets. They have vertical and horizontal vials. The horizontal vial has six-ring markings for setting 1% and 2% slopes for soil or waste pipe installation. The bodies are cast aluminium with a T-profile for strength and ease of handling. These levels come with a holster for carrying on your belt. Length 250mm, measurement accuracy: 0.029° = 0.5mm/m, accuracy overhead: 0.043° = 0.75mm/m.