The heart of Stabila level is the patented epoxy locked vial system. Ready for use off the shelf or out of the package.
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Stabila spirit levels are unparalleled with regard to their accuracy and dependability. A perfect system. The vial is firmly cast in the aluminum frame profile with non-shrink resin. No re-adjustment, no realignment, no tensioning against springs made of steel or fatigued plastic, no welding or clamping stresses. Just as accurate after 20 years as on the first day.