1Manufacturing Material: Made of impact resistant alloy metal body and high quality plastic bottle material, it is strong and durable, which can effectively prolong its service life.2Bubble Sensitivity: The circular bubble has a sensitivity of 15 feet per 2mm / 0.1in bubble movement.3Larger Diameter and Higher Accuracy: The circular bubble level has a larger diameter and higher accuracy, suitable for professional measurement and normal use.4Highly Shock Resistant: Circular levels are highly shock resistant but need to be avoided in strong sunlight.5Scope of Application: Suitable for precision instruments, machine tools, printers, lamps and lanterns, etc. 6Product Features: High transparent and wear resistant universal level, high precision integrated molding, horizontal direction at a glance. Fine workmanship, practical, extremely beautiful, high precision, easy to use, and is worth to play the boutique.