The Stabila 81S Torpedo Level with 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 and protecting noses to prevent damage to milled face. Specification 2 Vials 1 plumb and 1 horizontal. Accuracy Normal Position 0.029=0.5mm/m. Accuracy Overhead Position 0.043=0.75mm/m. 1 x Stabila 81S Torpedo Level 25cm