Features 【High Quality Material】: The square spirit level is made of special acrylic and ABS materials, providing a crystal clear view and easy identification of the measurement direction. 【Main Function】: This mini bubble level is mainly used to measure the levelness and verticality of objects. Check whether the tested object is parallel to the horizontal plane and whether it is tilted left and right. 【Easy to Use】: Simply place the round spirit level bubble at the desired location for measurement. When placed on a horizontal surface, the bubble will remain in the middle of the tube, allowing you to easily determine if the object is horizontal. 【Widely Application】: Our measuring instrument layout tools are perfect for leveling photo frames, art frames and murals, hanging paintings, set-top boxes, levels, pan heads, precision instruments, and more. 【High Accuracy】: High precision, and easy to use, fast and accurate; Precision machined internal radius, Black lines, internally fitted gives minimal parallax errors Features: 100% brand new and high quality Scope of application: level, camera head, precision instruments, etc The use of special acrylic and ABS materials, so that it is as clear as crystal, horizontal direction at a glance. Manufactured by Fine workmanship, practical and extremely beautiful High precision, and easy to use, fast and accurate   Specification: Measuring range: 1200（mm） Accuracy: 30 Size:15 * 15 * 40mm / 0.6 * 0.6 * 1.6in Weight: 48 g / 1.7 oz(approx.)   Package list: 5 x String Line Spirit Level Package List