Got a leak or need a reliable seal? This set of 10 nitrile rubber O-rings is just what you need! Each O-ring measures 31 mm inner diameter x 39 mm outer diameter x 4 mm wide, made from durable 70A shore hardness nitrile rubber that's resistant to wear, oils, and many chemicals. They're perfect for all sorts of sealing jobs—think plumbing fittings, automotive parts, pumps, valves, appliances, and DIY projects. The smooth surface ensures a tight seal, and they hold up well under pressure. Whether you're fixing a faucet, repairing machinery, or working on a car, these O-rings are a handy, affordable solution. Keep a set in your toolbox for whenever a seal goes bad. Comes with reliable customer support if you have any issues. A practical pack for home repairs or professional use.