round ductile manhole cover with frame China

1. material: ductile iron 500-7

2. class:E600 to EN124

3.frame weight: 52kg

ver weight:80kg

5.over all dimensions:  Ø 920 *110mm

6. clear opening:  Ø660mm

7. lifting holes: through(plugged with removable rubber stoppers)

8. bolting cover together: M16* 150MM bolts

9. frame and cover coating : black bituminous.

   thickness: 350μm