Sealing a leak or doing some plumbing? This set of 10 O-rings is just what you need. Each ring has a cord diameter (thickness) of 3.5mm and is made from NBR (Nitrile) rubber with a hardness of 70 Shore A. That makes them oil-resistant and perfect for a wide range of sealing applications with fluids, air, or fuel. They're brand new, unused, and come in their original packaging from online-dichtungsshop (manufacturer number 14325). Whether you're fixing a faucet, repairing machinery, or working on a car, these little rings are essential for preventing leaks. Ditch the old, cracked seals and pop in a fresh one for a tight, reliable fit. A must-have for any toolkit or workshop.