Multiple Sizes: The Nitrile Rubber O Ring Assortment Set includes 1020 pieces with 20 different metric sizes, featuring inner diameters ranging from 1mm to 25mm and thicknesses of 1mm, 2mm, 2.4mm, 2.5mm, and 3mm. This diverse range ensures that you will find the right fit for almost any application. High Quality Material: Crafted from commercial-grade NBR material, these o-rings can withstand a working temperature range of -40?/-40? to 248?/120?. Their superior resistance to extreme temperatures makes them ideal for use in thermal machinery, automotive applications, and plumbing repairs. Wide Applications: This o-ring assortment is perfect for a variety of sealing needs. Whether you are working on faucets, high-pressure washers, motorcycles, boats, car engines, pumps, solenoid valves, meters, sensors, or mechanical bearings, these o-rings provide reliable sealing for your DIY projects. Easy to Use and Store: The assortment comes neatly organized in a sturdy plastic storage box, with each size clearly labeled for effortless retrieval. This thoughtful packaging allows for convenient access and storage, making your repair tasks more efficient.