Universal mini size bubble level, convenient to carry. Can be used for level measurement of phonograph turntable, headshell and others. Clear liquid with green background, easy to use. Features: Universal mini size bubble level, convenient to carry. Can be used for level measurement of phonograph turntable, headshell and others. Clear liquid with green background, easy to use. Specifications: Item Size: 1.4 * 0.7cm/ 0.6 * 0.3in Item Weight: 4g/ 0.1oz(4pcs) Package List: 4 * Bubble Levels