1. Hot-dip galvanized surface treatment: Strong corrosion resistance. 2. Domestic anti-theft cover design: The manhole cover made of steel grating is connected to the frame with hinges, offering theft prevention, safety, and easy opening. 3. Aesthetically pleasing design: Simple lines, silver exterior, modern concept. 4. Large mesh for efficient drainage: Leak area reaches 83.3%, over twice that of cast iron. 5. Cost-effective materials: Lower cost than cast iron for large spans and heavy loads; also saves the cost of replacing cast iron covers due to theft or crushing. 6. High-strength carbon steel used, providing excellent strength to the steel grating: Much higher in strength and toughness than cast iron, suitable for environments with large spans and heavy loads like docks and airports. 7. Wide range of product varieties: Meets requirements for different environments, loads, spans, and shapes, and can be customized to customer-provided dimensions and shapes.