Stabila 96-2 Extra strong double plumb ribbed box section levels are made from an extra strong light metal rectangular profile with gripping ridges and removable end-caps made from two materials. The removable end-caps are also equipped with well-proven patented anti-slip stops. Has 2 vertical vials, 1 horizontal vial, and 2 milled measuring surfaces on levels up to 120cm. Levels over 120cm do not have milled surfaces. Measurement Accuracy: in normal position 0.029° = 0.5 mm/m. Overhead Measurement 0.043° = 0.75 mm/m.The Stabila 96-2 Level Pack contains the following: 1 x 96-2-60 Spirit Level 3 Vial 15226 60cm. 1 x 96-2-120 Spirit Level 3 Vial 15229 120cm. 1 x 96-2-180 Spirit Level 3 Vial 15230 180cm.Additional Information:Type: Series 96 / 196Length: Mixed SetNo. of Vials: Mixed SetConstruction: Box RibbedAccuracy-Normal Position: ± 0.5mm/m