Smooth aluminum rectangular profile. Coated measuring surface protects sensitive surfaces. Easy to clean thanks to smooth side surfaces and electrostatic powder coating. Plastic end caps protect the profile from impacts. STABILA mounting technology ensures long-term precision - measuring accuracy in normal position ± 0.5 mm/m, in folding position ± 1.0 mm/m. Features: 1 horizontal bubble, 1 vertical bubble, 1 coated measuring surface. Smooth aluminum profile - easy to clean. Coated measuring surface protects sensitive surfaces. Suitable for measurements in envelope position.