What is this?The metric Nitrile Rubber O Ring Assortment Kit can prevent leaks in fuel or water pipes, machinery, hydraulic, and pneumatic connections. It is great for DIY maintenance of sealing engine components, faucets, pipes, pumps, high-pressure washers, solenoid valves, instruments, sensors, mechanical bearings, and pressure pipelines.What will I get?We offer 6 sizes of Nitrile O-rings: 17x12.2x2.4mm (0.67x0.48x0.09"), 18x13.2x2.4mm (0.71x0.52x0.09"), 19x14.2x2.4mm (0.75x0.56x0.09"), 20x15.2x2.4mm (0.79x0.6x0.09"), 21x16.2x2.4mm (0.83x0.64x0.09"), 22x17.2x2.4mm (0.87x0.68x0.09")In the package of: 48 x Nitrile rubber o-rings (8pcs per size)Are there any advantages of the product?The Nitrile O-ring is made of nitrile rubber, offering excellent waterproof and oil-resistant properties, heat resistance, corrosion resistance, and wear resistance, ensuring a reliable seal. It has good heat resistance: -4 to 248 / -20 to 120 .How to use it?Clean the sealing surfaces thoroughly to remove any dirt, debris, or old O-ring material. Ensure that the groove where the O-ring will be placed is free of damage that could cause tearing.What should I notice?1. Regularly inspect the O-ring for signs of wear, damage, or degradation. 2. Please select the right diameter.