| Class | Manhole covers and grates | Manhole covers and grates | Dimensions (frame mm) | |
| Class1 | A15 | Green belts, sidewalks and other areas where motor vehicles are prohibited from entering. | 300*500*30 | |
| Class2 | B125 | sidewalk, non-motor vehicle, small car parking lot and underground parking lot. | 300*500*40 | |
| Class3 | C250 |
| 300*600*30 | |
| Class4 | D400 | urban trunk roads, highways, expressways and other areas. | 400*600*40 | |
| Class5 | E600 | Freight stations, docks, airports and other areas. | 450*750*30 | |
| Class6 | F900 | Airport runway area | 500*500*40 |
1.Automobile transportation,
2. Beijing railway,
3.sea transportation
2.Striving and enterprising
3.Love and friendliness
4.team spirit
5.Practical experience
6.Having 30 years of practical experience in casting
1.Q: Are you manufacture or trade company?
A: We are a manufacturer factory and we also have our own exporting license.
2.Q:Can I go to your factory to visit?
A:Of course, we welcome customers from all over the world to visit our factory.
3.Q: Can I have my own Logo on the product?
A: Yes, you can send us your drawing and we can make your logo, but you have to bear their own the cost.
4.Q: Can you produce the products according to my own drawings?
A: Yes, we can produce the products according to customers' custommization.
5.Q: Can I request to change the form of packaging and transportation?
A: Sure, we're glad to fulfill your requirement. Yet please understand that extra costs may occur if the form of packaging and transportation are changed.
