Round horizontal vial with magnifying glass effect. Edgeless horizontal vial creates a distortion-free view of the vial bubble, even with envelope measurement. Durable due to strong wall and shock-absorbing rubber end caps. Lifetime high measuring accuracy (0.5 mm/m) due to ultrasonically welded vials. Envelope measurement possible (0.75 mm/m). Anodized surface. Profile thickness: 1.6 mm. Vials: 2. Length: 20 cm.