Need some tough, reliable seals for repairs or projects? These MECCANIXITY FKM O-rings are up for the job. Made from fluorocarbon rubber (FKM), they're seriously durable and resistant to high temperatures, oils, acids, chemicals, and all sorts of harsh conditions. Each O-ring has an outer diameter of 6.5 mm (0.26\), an inner diameter of 2.5 mm (0.1\), and a width of 2 mm (about 5/64\). They come in a handy pack of 50, so you'll have plenty on hand for multiple fixes or future projects. With a hardness rating of 75A, they're firm enough to seal effectively but still flexible for easy installation. They can handle temps from -20°C up to 250°C (-4°F to 482°F), making them great for automotive engines, industrial machinery, plumbing, hydraulic systems, fuel lines, and more. Just make sure the surfaces are clean before you pop them in, and check the size matches what you need. Whether you're a DIYer, mechanic, or hobbyist, these O-rings are a reliable, affordable solution for stopping leaks and keeping things running smoothly.