This 100-piece O-ring set includes a comprehensive range of sizes from 45mm to 140mm outer diameter, all with consistent 1.9mm cross section. The set is designed to cover the most common sizes needed for automotive repairs, industrial maintenance, and general DIY projects.

Yes, NBR (Nitrile Rubber) is the preferred material for automotive applications due to its excellent resistance to oils, fuels, and hydraulic fluids. These O-rings are perfect for engine components, fuel systems, power steering, and other automotive systems where oil resistance is required.

The 1.9mm cross section provides an excellent balance between flexibility and durability. It's thick enough to provide good sealing performance in medium-pressure applications, yet flexible enough for easy installation. This makes it ideal for a wide range of general-purpose sealing applications.

While NBR O-rings are primarily designed for oil and fuel resistance, they work well with water in most applications. However, for continuous hot water exposure or drinking water systems, we recommend our EPDM O-rings which are specifically designed for water applications.

Store your O-rings in a cool, dark place away from direct sunlight, ozone sources, and extreme temperatures. Keep them in their original packaging or a sealed container to protect them from dust and contaminants. Proper storage will ensure your O-rings maintain their sealing properties for years.

The 100-piece set includes a carefully selected assortment of the most commonly used O-ring sizes from 45mm to 140mm OD, all with 1.9mm cross section. The set is packaged in a organized manner for easy size identification and comes with a complete size chart for quick reference.