Material:
- A B Frame brass. Tubular bubble vial glass. L1 L1

Version:
- Nickel-plated and high-gloss polished. Form B: black H H anodised. L L H1 H1 Sample order: L2 L2 Note: Bubble levels are used as a type of zero indicator instrument for checking horizontal inclination in e.g. B B spirit levels, inclinometers, metrology instruments and D4 D4 machine constructions. The tubular levels can be fastened using the two holes. - Form A: one sight window - Form B: three sight windows - Sensitivity in angular minutes for 2 mm bubble travel - Green filling Temperature range: -35 degC up to +55 degC.

Dimensions / Technical Data:
- Form: A.
- B: 12,3 mm.
- D4: 4,5 mm.
- H: 13 mm.
- H1: 1 mm.
- L: 57 mm.
- L1: 37 mm.
- L2: 45 mm.
- Sensitivity: 50 min.