describe: 1. Assortment of 270 rubber O-rings, 18 sizes, designed for most car air conditioners. Multiple size options, metric nitrile rubber O-rings. 2. Made of high quality rubber (hydrogenated nitrile rubber) resistant to oil, gas, water, alcohol solvents, high temperatures and high pressures. Can be formulated to meet application temperatures from -30F (-34C) to 250F (121C). 3. Full of elasticity: full of elasticity and resilience, good sealing effect, effectively preventing leakage of automotive air conditioning compressors, plumbing, machinery, hydraulic systems and pneumatic maintenance. < p>4. Easy to Organize: Equipped with a transparent plastic box, all joints are placed in a separate small space, which is more convenient to carry, collect and store. 5. Wide range of uses: very suitable for automotive plumbing maintenance, garages, workshops, automobiles, doors and windows, electrical appliances, bearings, water pumps, pulleys, suitable for automobiles , electrical appliances, machinery, industry, construction, home and others. fields. Green color Size: as shown Inner diameter thickness (mm) 20 15 10 5.29*1.78 10.82*1.78 13.9*1.8 6.07*1.78 10.77*2.62 13.95*2.62 6.8*1.9 11*2 14*2 7.65*1.78 12*2 15*2 7.8*1.9 17*2 8*2 17.7*1.78 8.8*1.9 17.04* 3.53 Product packaging: boxed