This item is good for using in leveling all sorts such as caravans, motor homes, fishing baskets or any DIY work. You could tell if the surface is tilted by the location of the bubble. The bubble level tools are made from , and the workmanship is very reliable. Long-time use is expected. Features -Color: Light green. -Material: Plastic. -Size: 3.95X0.95X0.95cm/1.55X0.37X0.37inches. -Multiple uses: Used for leveling all sorts such as caravans, motor homes, fishing baskets or any DIY work. -How to use: The position of the bubbles can be used to determine whether the surface is inclined. - : Made from , the workmanship is very reliable, can use for long time. -Easy to carry: Bubble levels tools are very small, easy to carry and storage. -Easy to use: High precision, bubble levels provide fast and accurate measurement, essential tools for craftsmen. Package list: 500 x Bubble Levels