Features: Comprehensive O rings assortment with size from M6toM30 ensures secure connection for automotive, machinery, and home repairs using nitrile rubber. Sturdy nitrile rubber construction offer corrosions resistance and leakproof performances, while the included storage box with organized compartments ensures easy access and neat maintenance. Ideal for professional mechanics and enthusiasts seek O rings repair set with sealing washers for various maintenance tasks. Addition for automotive repairs, machinery maintenance, plumbing systems, and household appliances to prevent fluid or gas leakage in high pressures environment. Portable storage designs allows quick identification of required washers, enhancing workflow efficiency during emergency fixes or routine equipment servicing. Specifications: Materials: Metal, Rubber Size: Mixed Type: As Picture Show, Two Type to Choose Package Includes: 100/245pcs Gasket Seal note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.