Manufacturing Material: Made of impact-resistant alloy metal body and high-quality plastic bottle material, it is strong and durable, effectively prolonging its service life. Bubble Sensitivity: The circular bubble has a sensitivity of 15 feet per 2mm / 0.1in bubble movement. Larger Diameter and Higher Accuracy: The circular bubble level features a larger diameter and higher accuracy, suitable for professional measurement and general use. Highly Shock Resistant: Circular levels are highly shock resistant and should be protected from strong sunlight. Scope of Application: Suitable for precision instruments, machine tools, printers, lamps, and other equipment. Product Features: High transparency and wear-resistant universal level, high-precision integrated molding, allowing horizontal alignment at a glance. Fine workmanship, practical design, aesthetically pleasing, high precision, and easy to use.