The Acrylic Automobile Oil Quality Comparator is made of high-quality acrylic board, making it wear-resistant and durable. It features a leak-proof screw with a rubber anti-leakage ring and a metal screw, ensuring no leakage. This comparator is designed to test the viscosity of engine lubricating oil, transmission oil, steering power oil, and hydraulic oil. However, it should not be used with brake oil. The viscosity of oil is an important factor in determining its quality. The lower the oil viscosity, the smaller the oil resistance and the better the oil flow. This comparator helps you assess the viscosity of different oils, allowing you to make informed decisions about their quality and performance. The Acrylic Automobile Oil Quality Comparator is available in various sizes, ranging from 2 holes to 7 holes. The transparent acrylic material allows for easy visibility of the oil samples. This package includes 1 piece of the Automobile Oil Quality Comparator. Key Features: Made of high-quality acrylic board Leak-proof screw with rubber anti-leakage ring Tests viscosity of engine lubricating oil, transmission oil, steering power oil, and hydraulic oil Various sizes available Transparent acrylic material for easy visibility Durable and wear-resistant Easy to use Package includes 1 piece of the comparator