270pcs rubber O-rings assortment, available in 18 sizes, designed to fit most car air conditioners. Multiple size options, metric nitrile O-rings. Made of high quality rubber (hydrogenated nitrile), resistant to oil, gas, water, alcoholic solvents, high temperature and pressure. Meets application temperatures from -30°F (-34°C) to 250°F (121°C). Elastic: It has elasticity and resilience, good sealing effect, and can effectively prevent leakage of automobile air conditioning compressors, pipelines, machinery, hydraulic circuits and pneumatic repairs. Easy to organize: Equipped with a transparent plastic box, all gaskets are placed in small separate spaces, which is easy to carry, collect and store. Wide application: Ideal for plumbing and auto repair, garages, workshops, cars, doors, windows, appliances, bearings, pumps, pulleys, suitable for automobiles, household appliances, machinery, industry, construction, home and other fields. Note: The data are all measured manually, please