Winnsty Bubble Spirit Level 66x10mm Circular Degree Marked Surface Level Circular Bullseye Bubble Degree Marked Surface. Easy to read.Round Bubble Level Measuring Instruments Tool Universal Tool. Used for adjusting the level of the woodworking tools, factory machinery,special instrument. Suitable for adjusting the level of PTZ level, medical equipment, office desktop, computer chassis, display, office machine. Easy to Use The spirit bubble is easy and simple to use. These levels can also used with Double sides tape to attach to anywhere,Just glue it on anywhere you need a level. Handy, Pocket sized for quick use anywhere. Function Suitable for adjusting the level of PTZ level, medical equipment, office desktop, computer chassis, display, office machine. Size Size: Diameter: 66mm. Thickness: 10mm.