Level 120 cm Aluminum Silver with Mirror Bubble max. ±0.5 mm/m PROMAT: made of aluminum with a silver powder-coated surface. It features an enlarged horizontal bubble for quicker reading of measurements and a patented mirror bubble. There is a top view of the vertical bubble, and the milled measuring surface extends over a length of 120 cm. The measurement accuracy in the normal position is ±0.5 mm/m, and in the inverted position, it is ±0.75 mm/m. Other technical features include a maximum measurement accuracy in the normal position of ±0.5 mm/m and a maximum measurement accuracy in the inverted position of ±0.75 mm/m.