The SEALFAST 1" Buna-N Extra Thick O-Rings come in a convenient package of 25, designed for superior sealing in various applications. Made from high-quality Buna-N rubber, these O-rings offer excellent resistance to oils, fuels, and chemicals, ensuring durability and reliability. With a 1-inch diameter, they are ideal for use in hydraulic and pneumatic systems, as well as in automotive and industrial applications. These O-rings meet industry standards for performance, providing a secure seal that prevents leaks and enhances system efficiency. Perfect for maintenance and repair tasks, they are a must-have for any toolkit.