Fangrui Product Details [multiple Functions]: As Level Tool, It Leveling Variety Of Places,to Show Horizontal Levels Everywhere. [easy To Use]: This Magnetic Bubble Level Can Stick On Anywhere. It Contains 4pcs Standard Levels. [high Precision]: Just Level Untile The Bubble In The Middle, It Shows The High Accuracy Mini Spirit Bubble Level Of Different Places. [wide Applications]: Adjust Photo Frame Level, Camera Level, Shelf Level, Equipment Level, Table Desktop Level, Level, Tripod Level, Rv Level, Scope Level, Spirit Level Measuring Tools Etc. [warm Tips]: Please Check Magnetic Magnet Bubble Spirit Level When Leveling. Colour: Black Material: Plastic Package Contents: 4 X Bubble Levels Only The Above Package Content, Other Products Are Not Included. Note: Light Shooting And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.