High-Quality Material: Made from commercial-grade nitrile butadiene rubber (NBR), these O-rings offer excellent corrosion resistance, heat resistance, wear resistance, and environmental protection. Wide Temperature Range: Suitable for use in temperatures ranging from -40°C (-40°F) to 120°C (248°F), ensuring reliable performance in both hot and cold conditions. Variety of Sizes: The set includes 270 O-rings in 18 different sizes, providing a versatile solution for various applications and eliminating the need for sorting and selecting sizes. Convenient Packaging: The O-rings come in a transparent plastic box with individual compartments for each size, making them easy to carry, select, and organize. Versatile Applications: Ideal for use in automotive air conditioning systems, water pumps, household appliances, faucets, machinery, and more, providing a safe and effective seal for air, oil, gas, and water.