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The 20x30x7 oil seal is typically made from high-quality materials such as Nitrile Butadiene Rubber (NBR), a popular choice due to its excellent resistance to oils and fuels
20x30x7 oil seal. The design incorporates a metal case for added strength and stability, ensuring the seal can withstand the pressures and temperatures encountered in various industrial environments.

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- Construction They are commonly utilized in building construction as weatherproof seals in windows, doors, and roofing systems
. Their ability to prevent water infiltration and air leakage makes them crucial for energy-efficient buildings.