Optical Leveling Device Level 120 cm. The 120 cm long level features a sturdy aluminum housing, block vials, and shock-resistant end caps for high durability and long lifespan. The non-slip end caps help prevent display deviations and provide additional stability during use. The level is equipped with enlarged vials in the center, UV-resistant vial liquid, and metal vial rings for accurate and lasting visibility. Additionally, its unique vial viewing window on the front ensures good readability from multiple angles.