Features 1、This bubble is made of premium plastic, more durable. 2、The product is as clear as crystal. It's very beautiful. 3、It is very easy to see the direction of measurement. 4、Level bubbles are very compact and can be carried around. 5、It is suitable for horizontal calibration of balance, electronic scale, camera platform and other equipment. Specification Feature: This bubble is made of premium plastic, more durable. The product is as clear as crystal. It's very beautiful. It is very easy to see the direction of measurement. Level bubbles are very compact and can be carried around. It is suitable for horizontal calibration of balance, electronic scale, camera platform and other equipment. Specification: Material: Plastic Accuracy: 10 Measure range: +30'/-6'MM Color: Black and white Product dimension: 4.2*4.2*1.1cm / 1.7*1.7*0.4in Weight: 41g / 1.4oz Package list: 5 * Level Bubble Note: The actual product color may deviate from the photo due to light. There may be a slight deviation in the measurement of product. Package List