Feature: The products are made of ABS and acrylic materials by special process. 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: ABS Plastic Measure range: 30±6°mm Accuracy: 10 Product dimension: 1.5*0.8*0.5cm / 0.6*0.3*0.2in Weight: 8g / 0.3oz 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.