The Stabila 81 SV REM Torpedo Levels have 1 plumb and 1 horizontal vial and an additional angle vial either pre-set (W45) or adjustable (W360) to report an angle. Also includes a special 6 ring vial for marking 1% and 2% slopes, ideal for soil or waste pipe installation. The level has a strong cast aluminium T-profile making it easy to hold. The particularly slender trapezoidal bevelled shape makes it suitable for working in cramped spaces. The die-cast frame has 1 milled measuring face with a V-groove and a rare earth magnet. Supplied with a holster. 81 SV REM W45: Fixed 45° Vial.81 SV REM W360: Rotating 360° Vial. Measurement accuracy: 0.029° = 0.5mm/m. For overhead measurements: 0.043° = 0.75mm/m.