Lockable Manhole Covers for Drainage Engineer

1. Application: Municipal engineering, telecom, cable, petroleum, chemical industry

2. Load ability: A15, B125, C250, D400

3. Characteristic: High shock resistance and tensile strength, good welding properties

4. Made of ductile iron casting & gray iron casting

5. Size: Dia300mm----900mm ( according to clients' detailed drawings)

6. Color: As clients' requirements