Quality accuracy & precision are the recognised features of stabila levels. All levels have unbreakable barrel-shaped vials manufactured from solid block plexiglas. Vials are securely bonded onto the body by the. Stabila patented procedure. Stabila professional levels are guaranteed to an accuracy of 0.5 mm. per metre other ranges to 1 mm. per metre. 80E-Series. Aluminium box section silver anodised level. 1 horizontal & 1 vertical vials & shock absorbing end caps. Accurate to 0.5 mm. per metre in the normal position. Length 600 mm. (24 in. ).