Stanley STHT43103-812 (600mm/24-Inch) Classic Box Level (Yellow) Size: 600mm / 24- inch. New shape box design, block magnified central vial. Large tubular side vials, vial accuracy: 0.5mm/m. Benefits: Easier to read, more durable in case of shocks, more ergonomical, easy to clean after use. 1 year manufacturer warranty on manufacturing defects.