1、419 Rubber Rings: In this kit, there are 419 metric rubber O ring gaskets, providing sealing and preventing leakage for a wide range of applications such as pipeline, mechanical, hydraulic, and pneumatic maintenance. 2、High Temperature and Low Temperature Resistance: The working temperature range is from ‑20 ℃ to ‑120 ℃, maintaining good elasticity. It has the advantages of ozone resistance and weather resistance, and is widely used in industries such as machinery, electronics, and hot water. 3、Multiple Sizes: Multiple sizes meet your needs: including 32 most commonly used sizes, from 3mm inner diameter to 50mm inner diameter, which can almost meet all your needs. 4、Widely Applicable: The universal O ring kit is crucial for all workshop and on‑site service engineers. Widely used in pipelines, machinery, faucets, garages, workshops, cars, doors and windows, electrical appliances, bearings, water pumps, etc. 5、High Tensile Strength: The tensile strength of the O ring is 10 MPa, with strong resistance to tensile deformation. It can become a qualified repair tool and is trustworthy.