Multiple sizes: This comprehensive O-ring assortment kit features 1540 pieces, including 32 standard metric sizes ranging from 4 mm to 50 mm in outer diameter and thicknesses from 1 mm to 3.5 mm. It also includes a 4-piece precision pick and hook set, designed to facilitate easy handling and installation of O-rings. This versatility ensures that you have the right size for nearly any automotive or plumbing repair task. High quality material: Crafted from commercial-grade Nitrile Butadiene Rubber (NBR), these O-rings exhibit exceptional durability and a broad working temperature range of -40? to 248? (-40? to 120?). Their superior resistance to extreme temperatures makes them ideal for applications in thermal machinery, automotive systems, and faucet sealing repairs. Wide applications: The O-ring classification is perfect for a variety of applications, including faucets, high-pressure washers, motorcycles, boats, car engines, pumps, solenoid valves, meters, sensors, mechanical bearings, and pressure pipes. This kit is essential for DIY enthusiasts and professionals alike when it comes to sealing repairs and maintenance tasks. The included hook and pick set further enhances its utility for handling clamps, wires, gaskets, and other precision components. Easy to use and store: Each of the 32 sizes of O-rings is meticulously organized within a sturdy plastic storage box, complete with detailed labeling for effortless identification. This thoughtful design ensures that users can quickly access the required size, making both retrieval and storage convenient and efficient.