Made of 316 stainless steel with precision casting, this seal achieves high hardness and deformation resistance while remaining corrosion-resistant and rust-proof for long-term durability. The surface is finished with a high-precision mirror polish, delivering exceptional brightness and reflectivity. The polished finish not only helps prevent rust and corrosion but also provides a premium, high-end look. A rubber gasket sits between the sealing cover and the main body. The manufacturing process is rigorous, with strict adherence to process standards and professional quality inspections at each stage to ensure reliable quality you can trust. The design is compact and practical, promoting stable operation. The built-in fixing system prevents the plug from being lost, and the unit offers good waterproof performance with no leakage. 2-3 practical use scenarios: - Sealing lids for chemical processing tanks or vessels where corrosion resistance is critical. - Premium closures for food or beverage processing equipment requiring a clean, leak-proof seal. - Outdoor or marine equipment and electrical enclosures that demand durable, waterproof protection.