Very high measuring accuracy in normal and handling conditions. Ergonomic, torsion-resistant aluminum profile for permanently precise measuring results. Better, faster, and more accurate reading with patented SOLA-FOCUS vials. Unbreakable acrylic glass block vials with magnifying lens (+60%) and a 30-year leakproof guarantee. Improved readability at twilight thanks to optimized SOLA luminous coating. Shock-absorbing two-component end caps offer optimum protection against damage. Set of three pieces.