Solid, grippy aluminum profile with dimensions of 51.5 x 25.3 mm and a weight of 630 g/m. Unbreakable block vials with very high transparency and durability. Horizontal vial with magnifying lens (+30%) and luminous coating. Shock-absorbing end caps and temperature-resistant vial housings. Vial radius of 200 mm, resulting in a sensitivity of 10 mm/m. Measurement tolerance in normal position ±0.5 mm/m, in inverted measurement ±0.75 mm/m. The vial fluid is a thin, colored oil mixture that allows the bubble to move optimally. High resistance to UV light and temperature fluctuations.