Square Manhole Cover With Double Seal Type Factory SGS Certificate
square manhole cover with double seal type factory
1. material: ductile iron 500-7
2. class:D400 to EN124
3.frame weight: 50kg
ver weight:70kg
5.over all dimensions:800*800*100MM
6. clear opening:550*550MM
7. lifting holes: through(plugged with removable rubber stoppers)
8. frame and cover coating : black bituminous.
thickness: 350μm
9.COVER AND FRAME: DOUBLE SEAL TYPE
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